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  1. A man riding a bicyle, completes one lap of a square field along its perimeter at the speed of 43.2 km/hr in 1 minute 20 seconds What is the area of the field?
    2. A.

    52900 sq.mts
    B.

    57600 sq. mts
    C.

    48400 sq.mts
    D.

    Cannot be determined
    E.

    None of these

    View Answer

    Workspace

    View Answer

    Answer : Option B

    Explanation :

    Speed = 43.2 kmph

    = 43.2 * 5/18 m/sec

    = 12 m/sec.

    Time = 80sec.

    Perimeter of  square field = 12 * 80 = 960 meters

    ∴ Side of the square field = 960/4 = 240

    ∴ Area of field = 240*240 = 57600 sq.meter


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