If volume and surface area of a sphere are numerically equal, then its radius =[[1]].

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Detailed Solution

If volume and surface area of a sphere are numerically equal, then its radius = 3units.
Given, the volume of the sphere = the surface area of sphere.

⇒ 43 π r 3 = 4 π r 2 ⇒ r = 3 units

Therefore, the radius of a sphere is 3 units.

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