Question

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

Answer 1

To find the volume of a cylindrical construction pipe, we can use the formula V = πr²h, where V is the volume, π is a constant approximately equal to 3.142, r is the radius of the pipe (half the diameter), and h is the length of the pipe. Given that the diameter of the pipe is 4ft and the length is 20ft, the volume of the pipe is 251.36 ft³.

Step-by-step explanation:

To find the volume of a cylindrical construction pipe, we can use the formula V = πr²h, where V is the volume, π is a constant approximately equal to 3.142, r is the radius of the pipe (half the diameter), and h is the height or length of the pipe.

Given that the diameter of the pipe is 4ft, the radius will be 2ft. And the length of the pipe is 20ft.

Plugging in these values into the formula, we get V = 3.142 × (2ft)² × 20ft = 251.36 ft³.

Answer 2

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

Step-by-step 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