Wednesday, January 21, 2009

Geometry question answered

Thank to everyone who sent us an answer. Each answer that we got was different but I think this one was right:

1 gallon = 231 cubic inches
pi*r^2*h/231 = 3.14159*(99/2)^2*73/231 = 2432.6 gallons

Thanks Lydia and Liz for the correct answer.

This means our water tank holds almost 2500 gallons of rain water. We have a metal roof and the water that falls on it is directed to the tank with gutters and pipes. We are in the wet season right now so the tank has been almost always full. PNG gets about 400 inches of rain a year but in the dry season we will need to switch to ram water (http://www.howstuffworks.com/question318.htm) from a creek.

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