Question

the ratio of two cylinders are in the ratio 3:2 and their heights are in ratio4:5 calculate the ratio of curved surface area

Answer 1

let the radius be 3x and 2x

and the height be 4y and 5y

now

C S A of cylinder=2*22/7*r*h

then

ratio =2*22/7*3x*4y/2*22/7*2x*5y

=6:5