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Question

If the volume in m2 and the surface area in m2 of a sphere are numerically equal then the radius of the sphere in m is

A
4
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B
2
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C
3.5
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D
3
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Solution

The correct option is D 3
Let the radius of the sphere is m
So volume of sphere=43πm3
And surface area of sphere= 4πm2
As per question both are numerically equal
43πm3=πm2m=3

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