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    The height of a cylinder whose radius is 7 cm and the total surface area is 968 cm² is:
    Question



    The height of a cylinder whose radius is 7 cm and the total surface area is 968 cm² is:

    A.

    15 cm

    B.

    17 cm

    C.

    19 cm

    D.

    More than one of the above

    E.

    None of the above

    Correct option is A


    The total surface area (TSA) of a cylinder is given by:
    TSA = 2πr(r + h)
    Where, r is the radius of the base, h is the height of the cylinder
    Given, Radius (r) = 7 cm and Total Surface Area (TSA) = 968 cm²
    968 = 2 x π x 7 x (7 + h)
    Divide both sides of the equation by 14π: (968 / 14π) = 7 + h
    Simplify: (968 / 44) = 7 + h
    22 = 7 + h
    Subtract 7 from both sides:
    h = 15 cm
    Therefore, the height of the cylinder is 15 cm.

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