Volumes Practice Test 1

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Question : 13 of 40

Marks: +1, -0

If the volume of a sphere is divided by its surface area, the result is 27 cm. Find the radius of the sphere.

81 cm
85 cm
90 cm
91 cm

Solution:

Here,

{4/3 πr^2}/{4πr^2}

= 27
⇒

r/3

= 27
∴ r= 81 cm

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