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Question 164
If the volume of a sphere is numerically equal to its surface area then its diameter is
Solution
Let the radius of sphere = $$r$$
Since, volume of sphere = surface area
=> $$\frac{4}{3} \pi r^3 = 4 \pi r^2$$
=> $$r = 3$$
=> Diameter = 2 * $$r$$ = 2*3 = 6 cm
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