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If the radius of a cylinder is increased by 25% and its height remains unchanged, then find the percent increase in volume.?

56.25%
52.25%
50.4%
60.26%

Correct Answer: 56.25%

Explanation:

According to the formula
Percentage increase in volume
= (2k + k²/100)% = ( 2 x 25 + 25²/100)%
= (50 + 625/100)% = (50 + 6.25)%
= 56.25%

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