Question

a cylinder has radius R and height H if the radius and height of a cylinder are doubled then a new cylinder is obtained find the ratio of curved surface area of the original cylinder to that of the new cylinder​

Answer 1

Answer:

hi!!

Let the original radius be r and height be h

Then the curved surface area of the cylinder is 2πrh

When the radius is doubled with height remaining unchanged, the new curved surface area will be 2π(2r)h = 4πrh.

Therefore, the ratio of curved surface area of new cylinder to the old cylinder = 4πrh:2πrh = 2 : 1

Step-by-step explanation:

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Answer 2

Answer:

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Step-by-step explanation:

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