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    5. If the volume of a cylinder is 180π and the ratio of radius to its height is 6:5 then find the curv

    Question

    If the volume of a cylinder is 180π and the ratio of

    radius to its height is 6:5 then find the curved surface area of cylinder?
    A 24π unit² Correct Answer Incorrect Answer
    B 80π unit² Correct Answer Incorrect Answer
    C 60π unit² Correct Answer Incorrect Answer
    D 56π unit² Correct Answer Incorrect Answer

    Solution

    Volume of cylinder = 180π ⇒ πr2h = 180π ⇒ r2h = 180 units ⇒ 36x2*5x = 180 units ⇒ x3 = 1 ⇒ x = 1 Radius = 6 units & height = 5 units. Curved surface area = 2πrh Curved surface area = 60π unit ²  

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