Multiple Choice Questions on What is the height of a solid cylinder of radius 5 cm and total surface area is 660 sq cm ........ for Mathematics - All Exams Preparation

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Multiple Choice Questions

What is the height of a solid cylinder of radius 5 cm and total surface area is 660 sq cm ........

Quantitative Aptitude ( CCS) Mensuration 3D
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    What is the height of a solid cylinder of radius 5 cm and total surface area is 660 sq cm ?

    10 cm

    Incorrect Answer

    12 cm

    Incorrect Answer

    15 cm

    Incorrect Answer

    16 cm

    Correct Answer
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    Explanation:

    Let the height of cylinder = h
    Given that, radius of cylinder (r) = 5 cm
    And, total surface area = 660 cm
    ∴  2πr(h + r) = 660
    2 x 22/7 × 5(h + 5) = 660
    (h + 5) = 660 × 7 /2 × 22 × 5 = 21
    ∴  h = 21 – 5 = 16 cm

    By: Amit Kumar
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