Question

In a cylinder if radius is double height is halved surface area will be?​

Answer 1

Step-by-step explanation:

Radius is doubled

height is halved

2pai rh

Answer 2

Answer:

hy

Step-by-step explanation:

let r and h be radius and height of the cyclinder, then C.S.A. = 2πrh

Now, radius is doubled and height is halved.

∴ New radius = 2r and new height = h / 2

New C.S.A. = 2π × 2r × h / 2 = 2πrh .