The radii of two right circular cylinders are in the ratio 2:3 and their heights are in the ratio 5:4. Calculate the ratio of their curved surface areas.

Explanation

Let the radii of two right circular cylinders are 2x and 3x.

And the height are 5x and 4x

As we know that C.S.A of cylinders = `2xxpixxrxxh`

Ratio's of C.S.A of two right circular cylinders = `2xxpixx2xxx5x`/`2xxpixx3xxx4x`

`10/12`=5:6

Hence, the ratio's are 5:6.