Question

the ratio of 2 radi of right circular cylinder are 2:3 there heights are in ratio 5:4.Calculate the ratio of CSA​

Answer 1

This is the answer.

Answer 2

Radii of one cylinder =2x

Radii of other cylinder=3x

Height of one cylinder= 5x

Height of other cylinder= 4x

Ratio of their C.S.A =

$\frac{2\pi \: rh}{2\pi \: rh}$

$= \frac{2\pi \:(2x)(5x)}{2\pi \:(3x)(4x)}$

$= \frac{10 {x}^{2} }{12 {x}^{2} }$

$= \frac{5}{6}$

=5:6