a train 100 m long is moving with the velocity of 72km/hr.find the time it takes to cross the bridge which is 2km long
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A train of 100m is crossing the bridge of 200m in length at speed of 72km/h. What is time taken by the train to cross the bridge?
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1km=1,000m
From the second the front nose of the train touches the bridge until the back-end of the train leaves the bridge, the train has to travel 300 meters.
The train travels 72km/h, or 72,000m/h.
72,000 % 300 means it will take 1/240th of an hour to cross the bridge.
1 hour has 3,600 second in it. 3,600 seconds % 240 (parts), means that it will take the 100m train 15 seconds to cross the 200m bridge.
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