In a cylinder, radius is doubled and height is halved, curved surface area will

halved

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doubled

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same

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four times

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Solution

The correct option is C same
Curved surface area of cylinder is $2 π r h$ .
Given, $R = 2 r, H = \frac{h}{2}$
Therefore, curved surface area of the cylinder $= 2 π R H$
$= 2 π (2 r) (\frac{h}{2})$
$= 2 π r h$

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Similar questions

In a cylinder, if radius is doubled and height is halved, curved surface area will be

(a) halved (b) doubled

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