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The magnitude of the area of a circle is seven times that of its circumference. What is the circumference (in units) of the circle ?
Answer & Solution
Correct Answer:
Option
A
$$\eqalign{
& \pi {R^2} = 7 \times \left( {2\pi R} \right) \cr
& \Rightarrow R = 14 \cr
& \therefore {\text{ Circumference :}} \cr
& {\text{= }}\left( {2 \times \frac{{22}}{7} \times 14} \right)\text{units} \cr
& = 88\,\text{units} \cr} $$
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