Question

the radii of two cylinder are in the ratio 2:3 and their height are in the ratio of 5:3 then find the ratio of their volumes

Answer 1

Volume of cylinder = 3.14 * r^2 * h
Ratio will be = r1^2*h1 : r2^2 * h2
= 2^2 * 5 : 3^2 * 3
= 20:27 ANS.

Curved Surface area of cylinder = 2 * 3.14 * r * h
So ratio of curved surface area will be = r1 * h1 : r2 * h2
= 2 * 5 : 3 *3
= 10 : 9