Hello, Lafexlos!

Here's #5 . . .

5) A right circular cone is found have base radius r = 40 cm and height h = 20 cm.

If it is known that each measurement is accurate to within 2%,

what is the maximum percentage error in the measurement of the volume?

The volume of a cone is: .

Hence: .

The percentage error is: . .[1]

We are given: .

Substitute into [1]: .