Question

Radius of cylinder is doubled keeping its lateral surface area same then its curved surface area is increased or decreased by how much percent​

Answer 1

Answer:

Lateral surface area of a cylinder =2πrh.

Let h

1

and h

2

be the heights.

Then 2×

7

22

×r×h

1

=2×

7

22

×2r×h

2

Clearly h

2

=

2

h

1

Answer 2

Lateral surface area of a cylinder =2πrh.

Let h¹and h² be the heights.

Then 2× 22/7×r×h¹ =2× 22/7×2r×h ²

Clearly h² = h¹/2

Hope it helps ❤️

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