Question

To the nearest square metre, calculate the curved surface area of the half pipe if it is 9m long? (With a radius of 2.5m)

Answer 1

70.686
`m^(2)`

Explanation:

A=2πrh (area of cylinder without top or bottom)

A = 2
`\pi`(2.5)(9)

A = 141.372

divide by two for half of pipe.

A = 70.686