CJ Developments

Our ProcessResearchConsolidationAnswers

How many people in a family?2.61 children born/woman (CIA World

Factbook)Round down to 2 childrenAdd 2 parentsEquals 4 people in a family!

Starting QuestionsHow much water does each person use?What do we use water for? What is the best shape to store water in?

Answering QuestionsWhat do we use water for?

DrinkingBathingWashing (dishes, laundry)ToiletsCooking

Answering QuestionsHow much water does an average person use?

Internet researchhttp://www.newsobserver.com/weather/drought/

story/1016009.html69.3 gallons per person for indoor purposes

laundry, shower, toilets, cooking, drinkingConvert into litres1 gallon = 3.78541178 litres

69.3 gallons ≈ 263 litres Leeway: 263 ± 2 litres

Answering QuestionsWhat is the best

shape to store water in?

Perimeter and Circumference vs. Area (of 2-D objects)

Circle vs. Square Real life examples A cylinder is the best

shape to store water in

CalculationTotal amount of water needed for entire

village:265L × 4 people × 50 families × 14 days = 742

000LVolume of storage tank: 742 000L of water =

742 m3

This estimation has more water capacity than is necessary because there is an extra 2 litres for every person

Surface Area of TankRadius (m) Base Area (m2) Height (m) SA (m2) TSA (m2) Cost of Metal ($) Cost of Concrete ($) Total Cost ($)

1 3 236 1484 1487 20820 680 21500

2 13 59 742 755 10564 2127 12691

3 28 26 495 523 7321 4379 11700

4 50 15 371 421 5898 7435 13333

5 79 9 297 375 5255 11296 16550

6 113 7 247 360 5046 15960 21006

7 154 5 212 366 5123 21429 26552

8 201 4 186 387 5412 27702 33114

9 254 3 165 419 5871 34780 40651

10 314 2 148 463 6476 42661 49137

JustificationViability vs. Cost

Is it really that good to have a 26m structure?

Is it possible to have a 26m structure that will hold its weight?

Amount of water used:Leeway for water use of people in case they

need more waterLevel of Accuracy (nearest whole number):

Easier to see the difference between figures

Our Storage TankHas a capacity of 742 000LIs in the shape of a cylinderDimensions:

Radius: 4 metresHeight: 15 metres

Starting QuestionsWhat kind of grain are we storing?How much grain are we putting in storage?What kind of shape is the best for storing the

grain?

Answering QuestionsWhat kind of grain are we storing?

Grain can be used to make many types of foodRice, corn, oats, ryeBread

for our purposes, we’ll pretend that we’re storing rice

Answering QuestionsHow much grain are we putting in storage?

The space that the cooked rice takes up is 3-4 times the space that uncooked rice takes up

Each person eats about 300cm3 of cooked rice per meal

300cm3 of cooked rice ≈ 100cm2 of uncooked rice

Answering QuestionsWhat kind of shape is best for storing the

grain?Real life examplesCylinder has the largest area for a fixed

perimeterCylinders are also used for silos

Examples of Grain Storage

http://www.dengie-crops.com/media/silos%20and%20lorry.JPG

http://www.mawaterquality.org/gallery/photos/hog%20grain%20storage.jpg

Calculation100cm3 uncooked rice × 3 meals × 4 people ×

50 families × 14 days = 840 000 cm3 of uncooked rice

840 000cm3 = 0.84m3

Shed has to have a volume of 0.84m3

*this is where a table will go*

This is where our answer will go

Justification‘cause like, it just is, man.(:-.- no, not really. This is where we write a

justification that is not yet thought of. I mean, we have to think about it.