Question

The ratio of the heights of two cylinders with equal base radius is 25 the ratio of their curved surfaces will be

Answer 1

The ratio of their curved surface is 2:

ratio of heights=2:5

we can say the heights as 2h and

so, curved surface area=2πrh

ratio of curved surface=2+rh/2+rh =2(2h)/2(5h) (tr cancel)

=2/5. -2:5

..the ratio of their curved surface is 2:5.