Question

    The volume of a hemisphere is 2425 (1/ 2) cm3

    . Find its radius (Take p = 22/7)
    A 9.5 cm Correct Answer Incorrect Answer
    B 10 cm Correct Answer Incorrect Answer
    C 10.5 cm Correct Answer Incorrect Answer
    D 12 cm Correct Answer Incorrect Answer

    Solution

    Let the radius of the hemisphere be R ┬а (2/3) x (22/7) ├Ч R3 = 2425.5 (2/3) ├Ч (22/7) x R┬│ = (4851/2) ┬а (2/3) ├Ч (22/7) ├Ч R┬│ = (99 ├Ч 49)/2 R┬│ = (3 ├Ч 3 ├Ч 11 ├Ч 7 ├Ч 7 ├Ч 3 ├Ч 7)/ (2 ├Ч 2 ├Ч 2 ├Ч 11) R┬│ = (3 ├Ч 3 ├Ч 3 ├Ч 7 ├Ч 7 ├Ч 7)/ (2 ├Ч 2 ├Ч 2) R = (3 ├Ч 7)/2 R = 10.5 cm. The radius of the hemisphere is 10.5 cm

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