Multiple Choice Questions on The radius of sphere is increased by 40 The increase in surface area of the sphere is ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

The radius of sphere is increased by 40 The increase in surface area of the sphere is ........

Quantitative Aptitude ( CCS) Mensuration 3D
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    The radius of sphere is increased by 40 %. The increase in surface area of the sphere is:

    56%

    Incorrect Answer

    63%

    Incorrect Answer

    96%

    Correct Answer

    68%

    Incorrect Answer
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    Explanation:

    Explanation Radius of sphere increased by 40 %. 
    ∴ new surface area = 1.4 x 1.4 
    ⇒ 1.96% increase in surface area =(1.96 - 1 / 1) x 100 
    = .96 x 100 = 96%

    By: MIRZA SADDAM HUSSAIN
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