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Question

Two steel sheets each of length a1 and breadth a2 are used to prepare the surfaces of two right circular cylinders - one having volume v1 and height a_2 and other having volume v2 and height a1. Then, (a) v1=v2 (b) a1v1=a1v2

(c) a1v1=a1v2 (d) v1a1=v2a2


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    Solution

    Length of each sheet = a1

    and breadth = a2

    Volume of cylinder = πr2h

    In first case,

    v1 is volume and a2 is the height

    a1 is the length i.e. circumference of the cylinder = a1

    Radius=a12π

    Volumev1=(a12π)2a2

    =a21a24π24π2v1=a21a2

    Similarly, v=a22a14π24π2v2=a1a22

    4π2v1a1=a1a2

    and 4π2v2a2=a1a2

    4π2v1a1=4π2v2a2

    v1a1=v2a2a2v1=a1v2


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