How much water is in a 14 pipe 4 miles long?

Answer 1

The volume of any cylinder is (pi) x (radius)2 x (length) .

The biggest part of working with this one is getting the units all consistent.

Radius = 1/2 the diameter = 7 inches = 7/12 foot

1 mile = 5,280 feet

4 miles = 21,120 feet

Volume = (pi) x (7/12)2 x (21,120) = 22,577.579 cubic feet (rounded)

That's the volume of the pipe. I have no way of knowing how much water may be

in it, and I suspect maybe you don't either. A pipe 4 miles long may have who-knows-

how-much mud, air, stones, bugs, mice, acorns, fish etc. in it.

That volume, incidentally, is the same as 168,892 gallons. (rounded)