If the radius of the circle is increased by $100 %$ , then the area is increased by

100 %

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200 %

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300 %

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400 %

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Solution

The correct option is C $300 %$
Since, area $\propto r^{2}$
Therefore, doubling the radius will increase the area by four times.
Therefore,
Change in area $= \frac{4 A - A}{A} \times 100$
$= 300 %$

Hence, option C.

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If the radius of the circle is increased by 100%, then the area is increased by

The correct option is C 300%Since, area ∝r2Therefore, doubling the radius will increase the area by four times.Therefore,Change in area =4A−AA×100=300%Hence, option C.

If the radius of the circle is increased by $100 %$ , then the area is increased by

The correct option is C $300 %$
Since, area $\propto r^{2}$
Therefore, doubling the radius will increase the area by four times.
Therefore,
Change in area $= \frac{4 A - A}{A} \times 100$
$= 300 %$

Hence, option C.