16
¹ 1 ´ Mid-Year Examination Specimen Paper 1 Be GREA¹T! MATHEMATICS (Secondary 1) © Sin�a�re Asia P�b�is�ers Pte Ltd. A�� ri�ts reserved. Re�r�d�cib�e �r �me/c�assr��m �se �n�y. S�RIC�LY NO� FOR SALE. L��k �r �t�er �se�� res�rces: www.sa�r�.c�m PART I (50 marks) D�rati�n: 1 �r 1 Simplify (a) 5 2 __ 3 − 2 1 __ 4 ÷ 5 2 __ 5 × 6, [1] (b) 1.2 × 0.025 __________ 0.4 × 50 , [1] (c) 2.3 2 + 23 × ____ 0.49 _______________ 9.2 ÷ 4 . [1] 2 Ex�ress 24 × 27 × 50 as a �r�d�ct �rime act�rs. Hence, find ___________ 24 × 27 × 50. [3] 3 It is �iven t�at −4 ñ x < 2 and 3 < y ñ 7, where x and y are integers. Find (a) t�e �east �ssib�e va��e � (y x), [1] (b) t�e �reatest �ssib�e va��e x 2 ___ 2y . [2] Mid-Year Examination Specimen Paper 1 Marks Obtained 100

Mid-Year Examination Specimen Paper 1 · 3 It is iven t at −4 ñ x < 2 and 3 < y ñ 7, where x and y are integers. Find (a) t e east ssib e va e (y − x), [1] (b) t e reatest ssib

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Page 1: Mid-Year Examination Specimen Paper 1 · 3 It is iven t at −4 ñ x < 2 and 3 < y ñ 7, where x and y are integers. Find (a) t e east ssib e va e (y − x), [1] (b) t e reatest ssib

¹ 1 ´Mid-Year Examination Specimen Paper 1

Be GREA¹T! MATHEMATICS (Secondary 1)© Sin�a��re Asia P�b�is�ers Pte Ltd. A�� ri��ts reserved.Re�r�d�cib�e ���r ��me/c�assr��m �se �n�y.S�RIC�LY NO� FOR SALE.L��k ���r �t�er �se���� res��rces: www.sa��r�.c�m

PART I (50 marks)D�rati�n: 1 ���r

1 Simplify

(a) 5 2 __ 3 − 2 1 __ 4 ÷ 5 2 __ 5 × 6, [1]

(b) 1.2 × 0.025 __________ 0.4 × 50 , [1]

(c) 2.32 + 23 × √____

0.49 _______________ 9.2 ÷ 4 . [1]

2 Ex�ress 24 × 27 × 50 as a �r�d�ct ��� �rime ��act�rs.

Hence, find √___________

24 × 27 × 50 . [3]

3 It is �iven t�at −4 ñ x < 2 and 3 < y ñ 7, where x and y are integers. Find (a) t�e �east ��ssib�e va��e ��� (y − x), [1]

(b) t�e �reatest ��ssib�e va��e ��� x2 ___ 2y . [2]

Mid-Year Examination Specimen Paper 1

Marks Obtained

100

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Page 2: Mid-Year Examination Specimen Paper 1 · 3 It is iven t at −4 ñ x < 2 and 3 < y ñ 7, where x and y are integers. Find (a) t e east ssib e va e (y − x), [1] (b) t e reatest ssib

¹ 2 ´Mid-Year Examination Specimen Paper 1

Be GREA¹T! MATHEMATICS (Secondary 1)© Sin�a��re Asia P�b�is�ers Pte Ltd. A�� ri��ts reserved.Re�r�d�cib�e ���r ��me/c�assr��m �se �n�y.S�RIC�LY NO� FOR SALE.L��k ���r �t�er �se���� res��rces: www.sa��r�.c�m

4 Given that 2p + r = q − 2

_____ p + 1 , ca�c��ate t�e va��e ��� q when p = 9 and r = −17.5. [3]

5 (a) Eva��ate 2.31 × 0.00465, c�rrect t� 2 si�nificant fi��res. Hence, state t�e va��e ��� 0.0231 × 4.65. [2] (b) R��nd ����� 425 011 m2 t� t�e nearest �ectar. [1]

6 Eva��ate 25 − [1.2 − (−5) ÷ 20 − 6] × 2. [3]

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Page 3: Mid-Year Examination Specimen Paper 1 · 3 It is iven t at −4 ñ x < 2 and 3 < y ñ 7, where x and y are integers. Find (a) t e east ssib e va e (y − x), [1] (b) t e reatest ssib

¹ 3 ´Mid-Year Examination Specimen Paper 1

Be GREA¹T! MATHEMATICS (Secondary 1)© Sin�a��re Asia P�b�is�ers Pte Ltd. A�� ri��ts reserved.Re�r�d�cib�e ���r ��me/c�assr��m �se �n�y.S�RIC�LY NO� FOR SALE.L��k ���r �t�er �se���� res��rces: www.sa��r�.c�m

7 (a) S�btract (4x3 − 7x − 2) ��r�m (3x3 − 5x2 + x + 13). [2]

(b) Simplify 2xy − 1

_______ x − 3 − 7y

______ 4 . [3]

8 C�m��ete t�e ������win� n�mber seq�ences:

(a) 19, 23, 27, 31, , [1]

(b) 2, 6, 18, 54, , [1]

9 (a) Given that 3 √___

64 = x, find t�e va��e ��� x2. [2] (b) ��e n�merat�r ��� a ��racti�n is 4 �ess t�an its den�minat�r. S�btractin� 1 ��r�m b�t� its

n�merat�r and den�minat�r �ives 1 __ 2 . Find t�e ��racti�n. [3]

10 S��ve t�e ������win� eq�ati�ns: (a) 3(x − 2) − 4(1 − x) = 8 [2]

(b) y + 2

_____ 5 + 1 = y + 1

_____ 2 [3]

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Page 4: Mid-Year Examination Specimen Paper 1 · 3 It is iven t at −4 ñ x < 2 and 3 < y ñ 7, where x and y are integers. Find (a) t e east ssib e va e (y − x), [1] (b) t e reatest ssib

¹ 4 ´Mid-Year Examination Specimen Paper 1

Be GREA¹T! MATHEMATICS (Secondary 1)© Sin�a��re Asia P�b�is�ers Pte Ltd. A�� ri��ts reserved.Re�r�d�cib�e ���r ��me/c�assr��m �se �n�y.S�RIC�LY NO� FOR SALE.L��k ���r �t�er �se���� res��rces: www.sa��r�.c�m

11 Jane is n years old and Jason will be twice as old as Jane in 5 years’ time. (a) �rite an ex�ressi�n ���r t�e di����erence in t�eir a�es. [2] (b) I�� Jas�n is 13 years ��der t�an Jane, find Jas�n’s �resent a�e. [3]

12 ��e fi��re be��w s��ws a sq�are inscribed in a circ�e. ��e �erimeter ��� t�e fi��re is 83.6 cm and t�e diameter ��� t�e circ�e is 14 cm. Find t�e area ��� t�e s�aded re�i�n.

(�ake � = 22 ___ 7 ) [5]

13 A cy�indrica� b�tt�e is �a���-fi��ed wit� 0.75 l ��� water. �akin� � = 3.142 and �ivin� y��r answers c�rrect t� tw� decima� ��aces, ca�c��ate

(a) t�e radi�s ��� t�e b�tt�e, [2] (b) t�e s�r��ace area ��� t�e b�tt�e t�at is in c�ntact wit� water. [3]

15 cm

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Page 5: Mid-Year Examination Specimen Paper 1 · 3 It is iven t at −4 ñ x < 2 and 3 < y ñ 7, where x and y are integers. Find (a) t e east ssib e va e (y − x), [1] (b) t e reatest ssib

¹ 5 ´Mid-Year Examination Specimen Paper 1

Be GREA¹T! MATHEMATICS (Secondary 1)© Sin�a��re Asia P�b�is�ers Pte Ltd. A�� ri��ts reserved.Re�r�d�cib�e ���r ��me/c�assr��m �se �n�y.S�RIC�LY NO� FOR SALE.L��k ���r �t�er �se���� res��rces: www.sa��r�.c�m

PART II (50 marks) D�rati�n: 1 ���r

1 Estimate eac� ��� t�e ������win�, �ivin� y��r answer c�rrect t� 1 si�nificant fi��re.

(a) 79.1 ÷ √____

15.9 − 3.013 [2]

(b) √

_____________ 0.04 × (−0.81)2 ______________ 5.1 [2]

2 (a) Simplify 3b ___ 10 × ( − 7 __ 8 ) ÷ 2a3 ___ 5 . [2]

(b) If u − v2 = 3 − w _____ u + 1 , ca�c��ate t�e va��e ��� w when u = 4.5 and v = −2. [2]

3 (a) Find t�e HCF and LCM ��� 18 and 34. [4] (b) (i) Ex�ress 1224 as a �r�d�ct ��� �rime ��act�rs. [1] (ii) Hence, find t�e �east va��e ��� k s�c� t�at 1224k is a �er��ect sq�are. [3]

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Page 6: Mid-Year Examination Specimen Paper 1 · 3 It is iven t at −4 ñ x < 2 and 3 < y ñ 7, where x and y are integers. Find (a) t e east ssib e va e (y − x), [1] (b) t e reatest ssib

¹ 6 ´Mid-Year Examination Specimen Paper 1

Be GREA¹T! MATHEMATICS (Secondary 1)© Sin�a��re Asia P�b�is�ers Pte Ltd. A�� ri��ts reserved.Re�r�d�cib�e ���r ��me/c�assr��m �se �n�y.S�RIC�LY NO� FOR SALE.L��k ���r �t�er �se���� res��rces: www.sa��r�.c�m

4 (a) Ca�c��ate t�e exact va��e ��� 3 √___________

0.008 × 125 __________ 0.027 . [2]

(b) Factorise 2c − 6d − 12ad + 4ac. [3]

5 (a) Simplify y − 1

_____ 2 − 3 − 2y

______ 8 + y ___ 12 . [3]

(b) S��ve t�e eq�ati�n 1 __ x − 2 ___ 5x = 1 ______ 2x − 1 . [4]

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Page 7: Mid-Year Examination Specimen Paper 1 · 3 It is iven t at −4 ñ x < 2 and 3 < y ñ 7, where x and y are integers. Find (a) t e east ssib e va e (y − x), [1] (b) t e reatest ssib

¹ 7 ´Mid-Year Examination Specimen Paper 1

Be GREA¹T! MATHEMATICS (Secondary 1)© Sin�a��re Asia P�b�is�ers Pte Ltd. A�� ri��ts reserved.Re�r�d�cib�e ���r ��me/c�assr��m �se �n�y.S�RIC�LY NO� FOR SALE.L��k ���r �t�er �se���� res��rces: www.sa��r�.c�m

6 Consider the following pattern:

1 __ 1 − 1 __ 3 = 2 _____ 1 × 3

1 __ 2 − 1 __ 4 = 2 _____ 2 × 4

1 __ 3 − 1 __ 5 = 2 _____ 3 × 5

• • • • • •

(a) �rite d�wn t�e 10th �ine in t�e �attern. [1]

(b) Hence, find t�e va��es ��� p and q if 1 __ p − 1 __ q = 1 ____ 180 . [3]

(c) Eva��ate 2 _____ 1 × 3 + 2 _____ 2 × 4 + 2 _____ 3 × 5 + … + 2 _______ 21 × 23 + 2 _______ 22 × 24 . [3]

7 At 08 40, a car �e��t ��wn P for Town Q at an avera�e s�eed ��� 75 km/�. ��e car can trave� 45 km ���rt�er i�� it increases its avera�e s�eed by 15 km/� ���r t�e same �eri�d ��� time. Find

(a) the time of arrival to Town Q ��� t�e car, [3] (b) the distance between Town P and Town Q. [2]

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Page 8: Mid-Year Examination Specimen Paper 1 · 3 It is iven t at −4 ñ x < 2 and 3 < y ñ 7, where x and y are integers. Find (a) t e east ssib e va e (y − x), [1] (b) t e reatest ssib

¹ 8 ´Mid-Year Examination Specimen Paper 1

Be GREA¹T! MATHEMATICS (Secondary 1)© Sin�a��re Asia P�b�is�ers Pte Ltd. A�� ri��ts reserved.Re�r�d�cib�e ���r ��me/c�assr��m �se �n�y.S�RIC�LY NO� FOR SALE.L��k ���r �t�er �se���� res��rces: www.sa��r�.c�m

8 In t�e fi��re, BFG and CEF are tw� identica� q�adrants and EFG is a straight line. It is given that AB = 2AD.

A B

D C

E F G

28 cm

�akin� � = 22 ___ 7 , ca�c��ate (a) t�e �erimeter ��� t�e s�aded re�i�n, [3] (b) t�e area ��� t�e s�aded re�i�n. [2]

A container with a cross-sectional base ABGFECD is s��wn in t�e fi��re be��w. ��e ca�acity ��� t�e tank is 19.6 �itres. It is 3 ___ 10 fi��ed wit� water. Ca�c��ate

(c) t�e �ei��t ��� t�e c�ntainer, [2] (d) t�e water �eve� i�� 4.9 �itres ��� water is rem�ved ��r�m t�e c�ntainer. [3]

A B

CD

E G

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Page 9: Mid-Year Examination Specimen Paper 1 · 3 It is iven t at −4 ñ x < 2 and 3 < y ñ 7, where x and y are integers. Find (a) t e east ssib e va e (y − x), [1] (b) t e reatest ssib

¹ 9 ´Mid-Year Examination Specimen Paper 2

Be GREA¹T! MATHEMATICS (Secondary 1)© Sin�a��re Asia P�b�is�ers Pte Ltd. A�� ri��ts reserved.Re�r�d�cib�e ���r ��me/c�assr��m �se �n�y.S�RIC�LY NO� FOR SALE.L��k ���r �t�er �se���� res��rces: www.sa��r�.c�m

PART I (50 marks)D�rati�n: 1 ���r

1 Eva��ate (a) (45 − 18 ÷ 3) ÷ [8 − (−4) + 1], [2] (b) 32 × 3 − 32 + (−3)3. [2]

2 Given that d = 4, e = −2 and f = −1, ca�c��ate t�e va��e ��� (a) de − f , [1]

(b) e2 + 2d − f 3, [2]

(c) √________

5 + 7e ________ 4f − 2d 2 . [2]

3 (a) Ex�ress 98 and 210 as t�e �r�d�ct ��� �rime ��act�rs. [2] (b) Hence, find t�e �east ��ssib�e inte�er k s�c� t�at 98k is a m��ti��e ��� 210. [2]

Mid-Year Examination Specimen Paper 2

Marks Obtained

100

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Page 10: Mid-Year Examination Specimen Paper 1 · 3 It is iven t at −4 ñ x < 2 and 3 < y ñ 7, where x and y are integers. Find (a) t e east ssib e va e (y − x), [1] (b) t e reatest ssib

¹ 10 ´Mid-Year Examination Specimen Paper 2

Be GREA¹T! MATHEMATICS (Secondary 1)© Sin�a��re Asia P�b�is�ers Pte Ltd. A�� ri��ts reserved.Re�r�d�cib�e ���r ��me/c�assr��m �se �n�y.S�RIC�LY NO� FOR SALE.L��k ���r �t�er �se���� res��rces: www.sa��r�.c�m

4 Find t�e exact va��e ���

(a) 1 7 __ 9 + 5 __ 6 × (−1 3 __ 5 )2, [2]

(b) 4.5 + 3. •2 •3 − 2.•1. [2]

5 S��ve t�e ������win� ineq�a�ities: (a) 3a < 27 [1]

(b) 5 − 2b > 1 __ 3 [1]

(c) 2 __ 9 c + 4 < −6 [2]

6 (a) Simplify 3x + x __ 2 − 4 − 5x ______ 7 . [2]

(b) Fact�rise 4ay − 2a + 4b(5 − 10y). [2]

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Page 11: Mid-Year Examination Specimen Paper 1 · 3 It is iven t at −4 ñ x < 2 and 3 < y ñ 7, where x and y are integers. Find (a) t e east ssib e va e (y − x), [1] (b) t e reatest ssib

¹ 11 ´Mid-Year Examination Specimen Paper 2

Be GREA¹T! MATHEMATICS (Secondary 1)© Sin�a��re Asia P�b�is�ers Pte Ltd. A�� ri��ts reserved.Re�r�d�cib�e ���r ��me/c�assr��m �se �n�y.S�RIC�LY NO� FOR SALE.L��k ���r �t�er �se���� res��rces: www.sa��r�.c�m

7 �rite d�wn t�e next tw� terms in t�e ������win� n�mber seq�ences: (a) 32, 34, 30, 32, 28, … [2]

(b) 1 __ 2 , 2 __ 3 , 3 __ 5 , 5 __ 8 , … [2]

8 S��ve (a) 1 − 2 __ 3 x = 0, [1]

(b) 3.2x − 8.1 = 1.6(1 − x), [2]

(c) x − 1 _____ 2 + 5 = 1 __ 2 − 3 − 12x _______ 6 . [3]

9 There are 8 more boys than girls in a class. There will be 8 more girls than boys after 1 __ 4 of the b�ys wa�k ��t ��r�m t�e c�ass. H�w many c�i�dren are t�ere in t�e c�ass at first? [4]

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Page 12: Mid-Year Examination Specimen Paper 1 · 3 It is iven t at −4 ñ x < 2 and 3 < y ñ 7, where x and y are integers. Find (a) t e east ssib e va e (y − x), [1] (b) t e reatest ssib

¹ 12 ´Mid-Year Examination Specimen Paper 2

Be GREA¹T! MATHEMATICS (Secondary 1)© Sin�a��re Asia P�b�is�ers Pte Ltd. A�� ri��ts reserved.Re�r�d�cib�e ���r ��me/c�assr��m �se �n�y.S�RIC�LY NO� FOR SALE.L��k ���r �t�er �se���� res��rces: www.sa��r�.c�m

10 A c�bic tank ��� �en�t� 6 cm was 0.4 fi��ed wit� water. An em�ty cy�indrica� beaker, ��� eq�a� radi�s and �ei��t, can ���d �a��� ��� t�e water in t�e tank. Ca�c��ate

(a) t�e ca�acity ��� t�e cy�indrica� beaker, [2] (b) t�e radi�s ��� t�e cy�indrica� beaker, c�rrect t� t�e nearest mm. [3]

11 ��e fi��re be��w s��ws a �rism. ��e v���me ��� t�e �rism is 80 �itres. Ca�c��ate (a) t�e cr�ss-secti�na� area ��� t�e �rism, [2] (b) t�e �en�t� ��� t�e �rism. [1] (c) Given t�at t�e c�st ��� �aintin� is $1 �er 500 cm2, find t�e t�ta� c�st ��� �aintin� 12 s�c�

simi�ar �risms. [3]

50 cm

40 cm

110 cm

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Page 13: Mid-Year Examination Specimen Paper 1 · 3 It is iven t at −4 ñ x < 2 and 3 < y ñ 7, where x and y are integers. Find (a) t e east ssib e va e (y − x), [1] (b) t e reatest ssib

¹ 13 ´Mid-Year Examination Specimen Paper 2

Be GREA¹T! MATHEMATICS (Secondary 1)© Sin�a��re Asia P�b�is�ers Pte Ltd. A�� ri��ts reserved.Re�r�d�cib�e ���r ��me/c�assr��m �se �n�y.S�RIC�LY NO� FOR SALE.L��k ���r �t�er �se���� res��rces: www.sa��r�.c�m

PART II (50 marks) D�rati�n: 1 ���r

1 Mr ��n� �ives 2 __ 5 of his monthly income to his wife, saves 1 __ 6 of the remaining money and gives twice as m�c� as �is savin�s t� �is 3 c�i�dren eq�a��y. He �as $450 �e��t. Ca�c��ate

(a) t�e ��racti�n ��� �is m�nt��y inc�me t�at �e �as �e��t, [3] (b) �is m�nt��y inc�me, [1] (c) t�e di����erence between t�e am��nts received by �is wi��e and eac� ��� �is c�i�d. [2]

2 (a) Sim��i��y t�e a��ebraic ex�ressi�n 2xy − 6x(1 + 3 __ 2 x − 7y). [2]

(b) Fact�rise 4a(2b − 6) − (3 − b). [2]

(c) S��ve t�e a��ebraic eq�ati�n 2 − 4 __ z2 = −0.25. [3]

3 Given t�at � = 4� √______

L _____ R − r , find t�e va��e ��� R w�en � = 44, � = 3 1 __ 7 , L = 49 and r = 5. [3]

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Page 14: Mid-Year Examination Specimen Paper 1 · 3 It is iven t at −4 ñ x < 2 and 3 < y ñ 7, where x and y are integers. Find (a) t e east ssib e va e (y − x), [1] (b) t e reatest ssib

¹ 14 ´Mid-Year Examination Specimen Paper 2

Be GREA¹T! MATHEMATICS (Secondary 1)© Sin�a��re Asia P�b�is�ers Pte Ltd. A�� ri��ts reserved.Re�r�d�cib�e ���r ��me/c�assr��m �se �n�y.S�RIC�LY NO� FOR SALE.L��k ���r �t�er �se���� res��rces: www.sa��r�.c�m

4 Eva��ate eac� ��� t�e ������win� �sin� a ca�c��at�r, �ivin� y��r answer c�rrect t� 2 decima� places:

(a) √______

2.0343 − 540.8 _________ 14.9 × 5.12 [2]

(b) 2 _________ 1 − 3 _____

1 + 5 __ 9 [2]

5 Given t�at 0.052 × 84.5 = 4.394, find t�e va��e ���

(a) 5.2 × 0.00845, [1]

(b) 0.04394 _______ 8.45 . [2]

6 ��e t�ta� mass ��� 2 simi�ar b�xes is 550 � �eavier t�an t�e t�ta� mass ��� 5 simi�ar �arce�s. I�� t�e t�ta� mass ��� 5 b�xes and 2 �arce�s is 6 k� 15 �, ��w m�c� �eavier is a b�x t�an a �arce�? [4]

7 ��e arc �en�t� ��� a semicirc�e is 40 cm ��n�er t�an t�e �erimeter ��� a sq�are ��� �en�t� 1.55 m. (a) Ca�c��ate t�e diameter ��� t�e semicirc�e. [3] (b) Hence, find t�e area ��� t�e semicirc�e. [1]

(�ake � = 22 ___ 7 )

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Page 15: Mid-Year Examination Specimen Paper 1 · 3 It is iven t at −4 ñ x < 2 and 3 < y ñ 7, where x and y are integers. Find (a) t e east ssib e va e (y − x), [1] (b) t e reatest ssib

¹ 15 ´Mid-Year Examination Specimen Paper 2

Be GREA¹T! MATHEMATICS (Secondary 1)© Sin�a��re Asia P�b�is�ers Pte Ltd. A�� ri��ts reserved.Re�r�d�cib�e ���r ��me/c�assr��m �se �n�y.S�RIC�LY NO� FOR SALE.L��k ���r �t�er �se���� res��rces: www.sa��r�.c�m

8 St�dy t�e fi��res be��w:

Figure 1 Figure 2 Figure 3 Figure 4

(a) C��y and c�m��ete t�e tab�e be��w: [2]

Figure n N�mber ��� dia��na�s, d N�mber ��� identica� trian��es, �1 1 22 2 43 44 8… … …9

(b) Ex�ress (i) d in terms of n, (ii) T in terms of n. [2]

(c) Hence, find t�e n�mber ��� trian��es in Figure 21. [1]

9 (a) Find t�e LCM ��� 30, 36 and 40. [2] (b) A car man���act�rer wi�� �a�nc� a new series ��� cars, m�de�s X, Y and Z, every 30 months,

3 years and 3 years 4 m�nt�s res�ective�y. It �a�nc�ed t�ese 3 m�de�s ��� cars at t�e same time in Jan�ary 2007. ��en wi�� t�e t�ree m�de�s ��� cars be �a�nc�ed t��et�er a�ain? [4]

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Page 16: Mid-Year Examination Specimen Paper 1 · 3 It is iven t at −4 ñ x < 2 and 3 < y ñ 7, where x and y are integers. Find (a) t e east ssib e va e (y − x), [1] (b) t e reatest ssib

¹ 16 ´Mid-Year Examination Specimen Paper 2

Be GREA¹T! MATHEMATICS (Secondary 1)© Sin�a��re Asia P�b�is�ers Pte Ltd. A�� ri��ts reserved.Re�r�d�cib�e ���r ��me/c�assr��m �se �n�y.S�RIC�LY NO� FOR SALE.L��k ���r �t�er �se���� res��rces: www.sa��r�.c�m

10 (�ake � = 22 ___ 7 )

(a) Find t�e �erimeter ��� t�e s�aded re�i�n. [3]

(b) A �����w bamb�� ��� t�ickness 7 mm �as a v���me ��� 161.7 cm3. The internal diameter ��� t�e bamb�� is 4.2 cm. Ca�c��ate

(i) its �en�t�, [2] (ii) its s�r��ace area. [3]

1.4 m

2.0 m

4.2 cm

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