Speed, Time and Distance

Speed, Time and Distance

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Aptitude miscellaneous
  1. If speed of 31/3 m/s is converted to km/h, then it would be








  1. View Hint View Answer Discuss in Forum

    ∵ 1 m/s = 18/5 km/h

    Correct Option: D

    ∵ 1 m/s = 18/5 km/h
    ∴ 31/3 m/s = 10/3 m/s = (10/3) x (18/5) km/h
    = 12 km/h

  1. If a person travel 39 km at a speed of 26 km/h, another 39 km at a speed of 39 km/h and 39 km again at a speed of 52 km/h . Then find the average speed of entire journey








  1. View Hint View Answer Discuss in Forum

    Average speed of entire journey
    = (39 + 39 + 39)/(39/26 + 39/39 +39/52)

    Correct Option: C

    Average speed of entire journey
    = (39 + 39 + 39)/(39/26 + 39/39 +39/52)
    = 3/(1/26 + 1/39 +1/52)
    = 3/[(6 + 4 + 3)/156]
    = 3 x 156/13 = 36 km/h

  1. A and B are 20 km apart. A can walk at an average speed of 4 km/hr and B at 6 km/h. If they start walking towards each other at 7:000 am, when they will meet?








  1. View Hint View Answer Discuss in Forum

    Sum of distance traveled by them after T hours
    6T + 4T = 20 KM
    T = 2 hours.

    Correct Option: C

    Suppose they will meet after T hours.
    Distance = Speed x Time
    Sum of distance traveled by them after T hours
    6T + 4T = 20 km
    T = 2 hours.
    So they will meet at 7:00 AM + 2 hours = 9:00 AM

  1. A boat moves downstream at 1 km in 5 minutes and upstream at 1 km in 12 minutes.What is the speed of current?








  1. View Hint View Answer Discuss in Forum

    Sd = 12 km/h
    Su = 5 km/h
    Speed of current = (Sd - Su)/2

    Correct Option: B

    Sd = 12 km/h
    Su = 5 km/h
    Speed of current = (12 - 5)/2 = 3.5 km/h

  1. A man takes 4 h 20 min in walking to a certain place and riding back. If he walk on both sides he losses 1 h. The time he would take by riding both ways is ?








  1. View Hint View Answer Discuss in Forum

    W + R = 4 h 20 min
    W + W = 5 h 20 min

    Correct Option: B

    W + R = 4 h 20 min
    W + W = 5 h 20 min
    ∴ R + R = 3 h 20 min