Question

IF IN A CYLINDER RADIUS IS DOUBLED AND HEIGHT IS HALVED THEN FIND ITS CURVED SURFACE AREA?​

Answer 1

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

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