Question

Find the ratio of curved surface area and volume of two right circular cylinder whose radius are in ratio 2:3 and heights are in the ratio 5:4.

Answer 1

CSA=2 πrh

Ratios =2π2x5:2π3x4

20π:24π

= 5:6, is the ratio of CSA

Volume=πr 2h

= π2^2 x 5: π3^2 x 4

20:36

= 5:9, is the ratio of volumes