The diameter of a cylindrical construction pipe is 4ft. if the pipe is 20ft long, what is its volume

Answer: Volume = π (2ft) ² (20ft) = 80 π ft² ≈ 251.3 ft²

Explanation:

1) Formula

Volume of a cylinder = area of the base * length

Area of the base = π r²

r = diameter / 2

2) Calculations:

r = 4 ft / 2 = 2 ft

length = 20 ft

Volume = π (2ft) ² (20ft) = 80 π ft² ≈ 251.3 ft²