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    Question

    The curved surface area of the sphere is 154

    cm2 . Find the volume of the sphere (rounded off to one digit after decimal).
    A 161.1 Correct Answer Incorrect Answer
    B 156.9 Correct Answer Incorrect Answer
    C 179.7 Correct Answer Incorrect Answer
    D 147.8 Correct Answer Incorrect Answer

    Solution

    using formula A= 4πr2 V = (4/3)πr3  ATQ- 4πr2=154 r =3.5cm volume of sphere= (4/3)πr3  4/3 ×22/7×3.5×3.5×3.5 =3793/21 =179.66

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