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In what time will a train 100 meters long cross an electric pole, if its speed be 144 kmph?
1. 2.5 seconds
2. 12.5 seconds
3. 3 seconds
4. 5 seconds

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Correct Answer - Option 1 : 2.5 seconds

Given:

Length of the train = 100 meters 

Speed of the train = 144 km/hr 

Formula used:

Time = Distance/Speed

Calculation:

Time in second = 100/(144 × (5/18))

⇒ 100/40 = 2.5

∴ A train will take time 2.5 second to cross an electric pole 

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