Question

Two cylinders have their radii in the ratio 4: 5 and their heights in the ratio 5: 6. Find the ratio of their curved surface areas

Answer 1

Answer:

R/r=4/5

H/h=5/6

CSA(Cylinder1)/CSA(Cylinder2)=

2πRH/2πrh=RH/rh(2π will get canceled)=R/r×Hh=4/5×5/6=4/6=2/3

Therefore ans is 2:3