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Volume and Surface Area of Solid Figures

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Aptitude miscellaneous
  1. If the radius of a cylinder is increased by 25% and its height remains unchanged, then find the percent increase in volume. ?
    1. 56.25%
    2. 52.25%
    3. 50.4%
    4. 60.26%
Correct Option: A

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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