If the rate of change of volume of a sphere is equal to the rate of change of its radius, then its radius is equal to

# If the rate of change of volume of a sphere is equal to the rate of change of its radius, then its radius is equal to

1. A

1 unit

2. B

3. C

4. D

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### Solution:

Let $r$ be the radius and $V$ be the volume of the

sphere. Then,

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