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Question

If the radius of a sphere is doubled, how many times does its volume become?

A
2 times
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B
4 times
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C
6 times
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D
8 times
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Solution

The correct option is D 8 times
Initial radius = r
Final radius = 2r
Initial Volume = 43πr3

Final volume = 43π(2r)3

Ratio will be equal to

Final VolumeInitial Volume=43π(2r)343πr3=8

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