If the radius of a circle is increased by $4$ times then its diameter increases by

5

times

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8

times

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12

times

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4

times

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Solution

The correct option is D $4$ times
For a circle, $D i a m e t e r = 2 \times R a d i u s$
This means Diameter and Radius are proportional to each other.
If Diameter increases 4 times, Radius will also increase $4$ times.

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