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Discussion

  1. By walking at 3/4 of his usual speed, a man reaches his office 20 minute later than usual. this usual time is ?
    1. 30 minute
    2. 60 minute
    3. 75 minute
    4. 1 hour 30 minute
  1. Correct Option: B

    At a speed of 3/4 of the usual speed, the time taken is 4/3 of the usual time
    = (4/3 of usual time ) – (usual time ) = 20min.
    ⇒ 4x/3 -x = 20
    ⇒ x/3 =20
    ⇒ x=60 min


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