Question

A train is hundred metre in length and running at a speed of 72 km/h. What is the time taken by the train to cross a bridge of the length 525 m.

Give answer in hours​

Answer 1

Step-by-step explanation:

look the bridge is 525 meters long but if a train wants to cross It then will be 625 meters long because for crossing the bridge the last point of the train should cover 100 meter distance more.

For speen of we convert the speed in m/s then it will be 20m/s so the time taken by the train to cross a bridge

Time = distance/speed

625/20

=31.25 second

Answer 2

Total length covered = length of bridge +

length of train

train = 525 + 100 m

train = 525 + 100 m = 625m

train = 525 + 100 m = 625m Speed = 72 km/ hr = 20 m/sec

train = 525 + 100 m = 625m Speed = 72 km/ hr = 20 m/secSpeed = distance/time

train = 525 + 100 m = 625m Speed = 72 km/ hr = 20 m/secSpeed = distance/time Speed × time = distance

train = 525 + 100 m = 625m Speed = 72 km/ hr = 20 m/secSpeed = distance/time Speed × time = distanceTherefore,

train = 525 + 100 m = 625m Speed = 72 km/ hr = 20 m/secSpeed = distance/time Speed × time = distanceTherefore, Time = Distance / Speed

train = 525 + 100 m = 625m Speed = 72 km/ hr = 20 m/secSpeed = distance/time Speed × time = distanceTherefore, Time = Distance / Speed = 625 / 20

train = 525 + 100 m = 625m Speed = 72 km/ hr = 20 m/secSpeed = distance/time Speed × time = distanceTherefore, Time = Distance / Speed = 625 / 20Time = 20 sec = 0.0055 hr

Hence, time = 0.0055 hr

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