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The curved surface area of a cylinder is five time the...

This question belongs to Arithmetic Ability Mensuration 3D
Mensuration 3D
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The curved surface area of a cylinder is five time the area of its base. Find the ratio of radius and height of the cylinder.

Answer & Solution
Correct Answer: Option C
$$\eqalign{ & \frac{{2\pi rh}}{{\pi {r^2}}} = \frac{5}{1} \cr & \frac{{2h}}{r} = \frac{5}{1} \cr & r:h = 2:5 \cr} $$
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