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Question

If the radius of the sphere is increased by 100%, the volume of the corresponding sphere is increased by-

A
200%
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B
500%
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C
700%
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D
800%
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Solution

The correct option is C 700%
Initial Volume (V) of sphere =43πr3
If the radius of a sphere increases by 100 %, it means the radius is doubled.
New volume of sphere is V1.
Now V1=43π(2r)3
V1=8V
So, volume will be 8 times the original volume.
% change in volume =(8VVV)×100=700 %
So, option C is correct.

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