Question

In a cylinder, if radius is doubled and
height is halved, then find its curved
surface area.​

Answer 1

Answer:

CSA of cylinder= 2πrh

new csa = 2*π*2r*1/2h

=2πrh

the csa would be the same

Answer 2

Answer:

Let the Original Radius be r, and Height be h of the Cylinder.

• New Radius = 2 × r = 2r
• New Height = h /2

• CSA of the Cylinder :

⇒ 2πrh

⇒ 2 × π × 2r × h /2

⇒ π × 2r × h

⇒ 2πrh

∴ There will be No Change in CSA.