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    Question

    The sum of the radius and height of a cylinder is 19m.

    The total surface area of the cylinder is 1,672 m² . What is the volume of the cylinder?
    A 3,080 m┬│ Correct Answer Incorrect Answer
    B 2,940 m┬│ Correct Answer Incorrect Answer
    C 3,220 m┬│ Correct Answer Incorrect Answer
    D 2,660 m┬│ Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Surface area of the cylinder = 1,672 m². ⇒ 2 πr ( r + h ) = 1,672 m² ⇒ 2 × 22/7 × r × 19 = 1,672 m² ⇒ r = (1672 × 7 )/(2 × 22 × 19) = 14 ∴ h = 19 - 14 = 5m ∴Volume of the cylinder = πr² h = 22/7 × 14 ×14 × 5 = 3,080m³

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