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Volume and Surface Area of Solid Figures

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  1. Two circular cylinders of equals volume have their heights in the ratio 1 : 2 Ratio of their radii is ?
    1. 1 : √2
    2. √2 : 1
    3. 1 : 2
    4. 1 : 4
Correct Option: B

Let their height be h and 2h radii be x and y respectively.
Then, πx2h = πy2(2h)
⇒ x2/y2 = 2/1
∴ x/y = √2 / 1 = √2 : 1


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