How many cubic feet in a 30 diameter pipe 200' long?

Answer 1

Capacity of a cylinder = (pi) (radius)2 (length)

Radius = 1/2 diameter = 15 inches = 1.25 ft

Capacity = (pi) (1.25-ft)2 (200-ft) = (pi) x (250 ft3) = 785.4 cubic ft (rounded)