When two trains are going in the same direction, then their relative speed is the difference between the two speeds.

When two trains are moving in the opposite direction, then their relative speed is the sum of the two speeds.

When a train crosses a stationary man/ pole/ lamp post/ sign post- in all these cases, the object which the train crosses is stationary and the distance travelled is the length of the train.

When it crosses a platform/ bridge- in these cases, the object which the train crosses is stationary and the distance travelled is the length of the train and the length of the object.

When two trains are moving in same direction, then their speed will be subtracted.

When two trains are moving in opposite directions, then their speed will be added.

In both the above cases, the total distance is the sum of the length of both the trains.

When a train crosses a car/ bicycle/ a mobile man- in these cases, the relative speed between the train and the object is taken depending upon the direction of the movement of the other object relative to the train- and the distance traveled is the length of the train.

Basic formula to remember:

1. how to convert “x km/hr” into m/s is
x km/hr = x*5/18 m/s
how to convert “x m/s” into km/hr is
x m/s = x*18/5 km/hr

2. Two trains in the Same direction (one train with x km/hr speed, second train with y km/hr speed) then total speed = (x+y) km/hr
Two trains in the opposite direction (one train with x km/hr speed, second train with y km/hr speed) then total speed = (x-y) km/hr

3. Speed = Distance/time

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Question 1 of 15

1. Question

A train which is 200m long is running at the speed of 60 km/hr. Find the time taken to pass a man standing at the railway station?

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Question 2 of 15

2. Question

A train which is a length of 110 meters travelling with a speed of 60 kmph. In what time it passes the man who is running with 6 kmph in opposite direction?

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Question 3 of 15

3. Question

Two trains with different lengths, one is 137 meters and second is 163 meters are running towards each other. The speeds are also different that is one with a speed of 42 kmph and second is 48 kmph. In what time that two trains are crossed each other?

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Question 4 of 15

4. Question

A train is 100 meter long and is running at the speed of 30 km per hour. Find the time it will take to pass a man standing at a crossing.

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Question 5 of 15

5. Question

In what time will a train 100 meters long cross an electric pole, if its speed is 144 km/hr

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Question 6 of 15

6. Question

A train running at the speed of 60 km/hr crosses a pole in 9 seconds. Find the length of the train.

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Question 7 of 15

7. Question

A 300 meter long train crosses a platform in 39 seconds while it crosses a signal pole in 18 seconds. What is the length of the platform.

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Question 8 of 15

8. Question

A train speeds past a pole in 15 seconds and a platform 100 meter long in 25 seconds. What is length of the train ?

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Question 9 of 15

9. Question

A train travelling at 60 kmph crosses a man in 6 seconds. What is the length of the train?

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Question 10 of 15

10. Question

Train A, 600 mts long is running at 80 kmph will take how much time to cross a man sitting in another train which is 400 mtres long, running at 64 kmph in the opposite direction?

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Question 11 of 15

11. Question

How long will a 150 m long train running at a speed of 60 kmph take to cross a bridge of 300 m?

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Question 12 of 15

12. Question

The length of the bridge, which a train 130 meters long and travelling at 45 km/hr can cross in 30 seconds, is:

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Question 13 of 15

13. Question

A train passes a station platform in 36 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km/hr, what is the length of the platform?

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Question 14 of 15

14. Question

The length of the bridge, which a train 130 metres long and travelling at 45 km/hr can cross in 30 seconds, is:

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Question 15 of 15

15. Question

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: