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  • Question

  • Two trains are running in opposite directions in the same speed. The length of each train is 120 meter. If they cross each other in 12 seconds, the speed of each train (in km/hr) is


  • Options
  • A. 42
  • B. 36
  • C. 28
  • D. 20

  • Correct Answer
  • 36 

    Explanation

    Distance covered = 120+120 = 240 m

    Time = 12 s

    Let the speed of each train = v. Then relative speed = v + v = 2v

    2v = distance/time = 240/12 = 20 m/s

    Speed of each train = v = 20/2 = 10 m/s

    = 10 × 36/10 km/hr = 36 km/hr

    • Problems on Trains

    Search Results

    • 1. Two cogged wheels of which one has 32 cogs and other 54 cogs, work into each other. If the latter turns 80 times in three quarters of a minute, how often does the other turn in 8 seconds?

    • Options
    • A. 48
    • B. 24
    • C. 38
    • D. 36
      • Discuss
    • 2. A man's speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man's speed against the current is :

    • Options
    • A. 9.5 km/hr
    • B. 10 km/hr
    • C. 10.5 km/hr
    • D. 11 km/hr
      • Discuss
    • 3. Two trains started at the same time, one from A to B and the other from B to A . If they arrived at B and A respectively 4 hours and 9 hours after they passed each other the ratio of the speeds of the two trains was

    • Options
    • A. 2:1
    • B. 3:2
    • C. 4:3
    • D. 5:4
      • Discuss
    • 4. A train of length 110 meter is running at a speed of 60 kmph. In what time, it will pass a man who is running at 6 kmph in the direction opposite to that in which the train is going?

    • Options
    • A. 10
    • B. 8
    • C. 6
    • D. 4
      • Discuss
    • 5. A man sitting in a train which is traveling at 50 kmph observes that a goods train, traveling in opposite direction, takes 9 seconds to pass him. If the goods train is 280 m long, find its speed.?

    • Options
    • A. 60
    • B. 62
    • C. 64
    • D. 65
      • Discuss
    • 6. A train moves past a telegraph post and a bridge 264 m long in 8 seconds and 20 seconds respectively. What is the speed of the train ?

    • Options
    • A. 69.5 km/hr
    • B. 70 km/hr
    • C. 79 km/hr
    • D. 79.2 km/hr
      • Discuss
    • 7. A train moves with a speed of 108 kmph. Its speed in metres per second is :

    • Options
    • A. 10.8
    • B. 18
    • C. 30
    • D. 38.8
      • Discuss
    • 8. Two stations P and Q are 110 km apart on a straight track. One train starts from P at 7 a.m. and travels towards Q at 20 kmph. Another train starts from Q at 8 a.m. and travels towards P at a speed of 25 kmph. At what time will they meet?

    • Options
    • A. 10.30
    • B. 10
    • C. 8.45
    • D. 9.30
      • Discuss
    • 9. Two trains of equal length , running in opposite directions , pass a pole in 18 and 12 seconds. The trains will cross each other in

    • Options
    • A. 14.4 sec
    • B. 15.5 sec
    • C. 18.8 sec
    • D. 20.2 sec
      • Discuss
    • 10. A train travelling at a speed of 75 mph enters a tunnel 312 miles long. The train is 14 mile long. How long does it take for the train to pass through the tunnel from the moment the front enters to the moment the rear emerges?

    • Options
    • A. 2.5 min
    • B. 3 min
    • C. 3.2 min
    • D. 3.5 min
      • Discuss

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