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    Question

    A hollow cylindrical pipe has an inner radius of 8 cm. If

    the length of the pipe and the thickness of the pipe are 12 cm and 2 cm, respectively, determine the approximate volume of the pipe. (Use π = 22/7)
    A 1124 cm³ Correct Answer Incorrect Answer
    B 1850 cm³ Correct Answer Incorrect Answer
    C 1488 cm³ Correct Answer Incorrect Answer
    D 1785 cm³ Correct Answer Incorrect Answer

    Solution

    ATQ,

    Outer radius of the pipe = 8 + 2 = 10 cm

    Volume of the pipe = π × height × [(outer radius)² - (inner radius)²]

    = (22/7) × 12 × (10² - 8²)

    = (22/7) × 12 × (100 - 64)

    = (22/7) × 12 × 36

    = 1,123.71 cm³ or 1124 cm³

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