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A train that is running at speed of 72 km/hr crosses an electric pole in 36 seconds. The length of train (in metres) is:


1. 360 m
2. 460 m
3. 350 m
4. 720 m

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Correct Answer - Option 4 : 720 m

Given:

A train that is running at speed of 72 km/hr crosses an electric pole in 36 seconds. 

Concept used:

Distance = speed × time

Calculation:

Distance = 72 km/hr × 36 seconds

We need to find the distance in metres so convert the speed into metre/seconds

72 × (5/18) = 20 m/sec

Distance = 20 × 36

Distance = 720 m

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