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If the height of a come is doubled, then its volume is increased by?

100%
200%
300%
400%

Correct Answer: 100%

Explanation:

Original volume = 1/3 πr²h;
New volume = 1/3 πr²(2h) = 2/3πr²h
Required increased % = [πr²h/3]/[πr²h/3] x 100%
= 100%

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