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Quiz: Problems on Trains

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Number of Questions: 49

Question: 21 -

A train 360 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long? 

Options:

  1. 42 sec

  2. 48 sec

  3. 40 sec

  4. 45 sec

    5. Answer:

    40 sec
    Solution:

    Speed = 45 * 5/18 = 25/2 m/sec
    Total distance covered = 360 + 140 = 500 m
    Required time = 500 * 2/25 = 40 sec

Question: 22 -

In what time will a train 100 m long cross an electric pole, it its speed be 144 km/hr? 

Options:

  1. 5 sec

  2. 4.25 sec

  3. 12.5 sec

  4. 2.5 sec

    5. Answer:

    2.5 sec
    Solution:

    Speed = 144 * 5/18 = 40 m/sec
    Time taken = 100/40 = 2.5 sec.

Question: 23 -

A train 280 m long, running with a speed of 63 km/hr will pass a tree in? 

Options:

  1. 15 sec

  2. 18 sec

  3. 20 sec

  4. 16 sec

    5. Answer:

    16 sec
    Solution:

    Speed = 63 * 5/18 = 35/2 m/sec
    Time taken = 280 * 2/35 = 16 sec

Question: 24 -

A train running at the speed of 60 km/hr crosses a pole in 9 sec. What is the length of the train? 

Options:

  1. None of these

  2. 120 m

  3. 180 m

  4. Cannot be determined

    5. Answer:

    None of these
    Solution:

    Speed = 60 * 5/18 = 50/3 m/sec
    Length of the train = speed * time = 50/3 * 9 = 150 m

Question: 25 -

How long does a train 110 m long running at the speed of 72 km/hr takes to cross a bridge 132 m length? 

Options:

  1. 14.3 sec

  2. 12.42 sec

  3. 12.1 sec

  4. 9.8 sec

    5. Answer:

    12.1 sec
    Solution:

    Speed = 72 * 5/18 = 20 m/sec
    Total distance covered = 110 + 132 = 242 m.
    Required time = 242/20 = 12.1 sec.