Problems on trains

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

5 seconds

4.5 seconds

3 seconds

2.5 seconds

Explanation:

First convert speed into m/sec

Speed = 144*(5/18) = 40 m/sec

Time = Distance/speed
= 100/40 = 2.5 seconds

Hence, option 4 is the correct answer.

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