Question

The radii of two cylinders are in the ratio 2:3 and heights are in the ratio 5:3 . calculate the ratio of their volumes and ratio of their curved surfaces.

Answer 1

since volume of cylinder = πr^2h therefore,pie*2*2*h : pie 3"3*h
we get ,
4:9 as the ratio of their volumes.
Now for curved surface of cylinder = 2πrh
2*π*2*h:2*π*3*h
we get,
4:6 = 2:3 as the ratio of their curved surface .

Answer 2

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