Question

The ratio of heights of two cylinder with equal base radius is 2:5the ratio of their curved surface will be ​

Answer 1

Answer:

Let the radius of the two cylinders=r

Ratio of heights=2:5

We can say the heights as 2h and 5h

So, Curved surface area=2πrh

Ratio of Curved Surface=2πrh/2πrH

=2(2h)/2(5h)  (πr cancel)

=2/5. =2:5

∴The ratio of their curved surface is 2:5.