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    The rate of change (in cm²/s) of the total surface area of a hemisphere with respect to rad r at cm is:
    Question

    The rate of change (in cm²/s) of the total surface area of a hemisphere with respect to rad r at cm is:

    A.

    66π

    B.

    6.6π

    C.

    3.3π

    D.

    4.4π

    Correct option is B

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