Ratio of lateral surface areas to two cylinders with equal heights is:

H : h

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R : r

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1 : 2

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None

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Solution

The correct option is B $R : r$
Let radius of one cylinder $= R$
Radius of another cylinder $= r$
Height of cylinder $= h$
Now,
$\frac{S_{1}}{S_{2}} = \frac{2 π R h}{2 π r h} = \frac{R}{r} {∴ S}_{1} : S_{2} = R : r$

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