What is the speed of the train in kmph?

    I. The train crosses an ‘x’ metre long platform in ‘n’seconds.

    II. Length of the train is ‘y’ metre.

    III The train crosses a signal pole in ‘m’ seonds.

  • Any two of the three
  • I and II
  • I and III
  • All I,II and III
  • Question cannot be answered even with information in all three statements
  • Explanation:

    By I and II we get,

    Speed = x+y/n

    By II and III we get,

    Speed = y/n

    By I and III we get,

    Let the length of the train = L

    Speed = L/m

    m ×Speed = L

    Speed = x+L/n

    Speed × n=x+m×Speed

    Speed = x/n-m


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What is the speed of the train in kmph? I. The train crosses an ‘x’ metre long platform
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