Question

If the radius of a cylinder is doubled and its curved surface area is not changed, the height must be halved.​

Answer 1

Radius of cylinder=r

Height=h

Curved surface area=2πrh

When the radius is doubled and its Curved surface area is not changed, the height must be halved.

Then, Curved surface area= 2π(2r)h/2

it will equal to = 2πrh

Answer 2

Answer:

2πrh..........

I hope it will be helpful for you.........