Math CentralQuandaries & Queries


A water treatment plant is built with three cylindrical tanks to contain the water for a town.  Each tank has a radius of 15 feet and a depth of 25 feet.  If there are 7.5 gallons in a cubic foot of water, approximately how many gallons of water can be treated at the plant at any one time?



The volume of a cylinder is pi r2 h where r is the radius and h is the height. Since your measurements are in feet this will give the volume in cubic feet. Multiply be 3 to obtain the total volume of the three tanks and then convert to gallons using the conversion factor you supplied.


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