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Home Aptitude Problems on Trains Comments

  • Question
  • Two goods train each 500 m long, are running in opposite directions on parallel tracks. Their speeds are 45 km/hr and 30 km/hr respectively. Find the time taken by the slower train to pass the driver of the faster one.


  • Options
  • A. 12 sec
  • B. 24 sec
  • C. 48 sec
  • D. 60 sec

  • Correct Answer
  • 24 sec 

    Explanation
    Relative speed = = (45 + 30) km/hr
    = 75 x 5 m/sec
    18
    = 125 m/sec.
    6

    We have to find the time taken by the slower train to pass the DRIVER of the faster train and not the complete train.

    So, distance covered = Length of the slower train.

    Therefore, Distance covered = 500 m.

    ∴ Required time = 500 x 6 = 24 sec.
    125

  • Problems on Trains


    Search Results


    • 1. A train travelling at 48 kmph completely crosses another train having half its length and travelling in opposite direction at 42 kmph, in 12 seconds. It also passes a railway platform in 45 seconds. The length of the platform is

    • Options
    • A. 400 m
    • B. 450 m
    • C. 560 m
    • D. 600 m
    • Discuss
    • 2. A train 108 m long moving at a speed of 50 km/hr crosses a train 112 m long coming from opposite direction in 6 seconds. The speed of the second train is:

    • Options
    • A. 48 km/hr
    • B. 54 km/hr
    • C. 66 km/hr
    • D. 82 km/hr
    • Discuss
    • 3. Jar A has 36 litres of mixture of milk and water in the respective ratio of 5 : 4. Jar B which had 20 litres of mixture of milk and water, was emptied into jar A, and as a result in jar A, the respective ratio of milk and water becomes 5: 3. What was the quantity of water in jar B?

    • Options
    • A. 5 lit
    • B. 3 lit
    • C. 8 lit
    • D. 2 lit
    • Discuss
    • 4. A mixture contains spirit and water in the ratio of 3 : 2. If it contains 3 litres more spirit than water, the quantity of spirit in the mixture is

    • Options
    • A. 12 litres
    • B. 10 litres
    • C. 9 litres
    • D. 8 litres
    • Discuss
    • 5. In what ratio must a mixture of 20% milk strength be mixed with that of 60% milk strength so as to get a new mixture of 25% milk strength?

    • Options
    • A. 7 : 1
    • B. 4 : 1
    • C. 5 : 2
    • D. 9 : 2
    • Discuss
    • 6. Two trains running in opposite directions cross a man standing on the platform in 27 seconds and 17 seconds respectively and they cross each other in 23 seconds. The ratio of their speeds is:

    • Options
    • A. 1 : 3
    • B. 3 : 2
    • C. 3 : 4
    • D. None of these
    • Discuss
    • 7. A train overtakes two persons who are walking in the same direction in which the train is going, at the rate of 2 kmph and 4 kmph and passes them completely in 9 and 10 seconds respectively. The length of the train is:

    • Options
    • A. 45 m
    • B. 50 m
    • C. 54 m
    • D. 72 m
    • Discuss
    • 8. Two trains, each 100 m long, moving in opposite directions, cross each other in 8 seconds. If one is moving twice as fast the other, then the speed of the faster train is:

    • Options
    • A. 30 km/hr
    • B. 45 km/hr
    • C. 60 km/hr
    • D. 75 km/hr
    • Discuss
    • 9. A train 240 m long passes a pole in 24 seconds. How long will it take to pass a platform 650 m long?

    • Options
    • A. 65 sec
    • B. 89 sec
    • C. 100 sec
    • D. 150 sec
    • Discuss
    • 10. A jogger running at 9 kmph alongside a railway track in 240 metres ahead of the engine of a 120 metres long train running at 45 kmph in the same direction. In how much time will the train pass the jogger?

    • Options
    • A. 3.6 sec
    • B. 18 sec
    • C. 36 sec
    • D. 72 sec
    • Discuss


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