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| Math Central | Quandaries & Queries |
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Question from John: How many feet of one inch pipe would it take to hold 30 and 40 gallons of water? Imperial gallons please. |
Hi John,
There are 277.419547 cubic inches.
The volume of a cylinder is π r2 h where r is the radius, h is the height and π is approximately 3.1416.
If the inside diameter of the pipe is 1 inch then for 30 gallons you have
π (1/2)2 h = 30 × 277.419547
or
h = 30 × 277.419547/(π/4) = 10596.65 inches
which is 883 feet.
Penny
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