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Volume and Surface Area of Solid Figures

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Aptitude miscellaneous
  1. The percentage increased in the surface area of a cube when each side is doubled, is ?
    1. 25%
    2. 50%
    3. 150%
    4. 300%
Correct Option: D

Original area = 6a2
New area = 6(2a)2 = 24a2
Required increased % = (18a2/6a2) x 100%
= 300%


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