A train passes over a 400 m long bridge. Ifthe speed of the train is 3

1.	A train passes over a 400 m long bridge. Ifthe speed of the train is 30 m/s and thetrain takes 20 s to cross the bridge, thenthe length of the train is
Answer» Distance=speedtime=3020=600m To cross the bridge, the train will have to cover a distance equal to the sum of length of the bridge and length of the train. speed of train = 30 m/stime taken = 20sdistance covered = 30 × 20 = 600m now, length of bridge = 400mlength of train = 600 - 400 = 200m Let the length of train be xthen , distance covered by train = 400m + xspeed = 30m/s time = 20sso , we know that , speed = distance/time distance = speed × time d(400+x) = 30 × 20400+x = 600x = 200m length of train = 200mhope this helps

A train passes over a 400 m long bridge. Ifthe speed of the train is 30 m/s and thetrain takes 20 s to cross the bridge, thenthe length of the train is

Answer»

Distance=speed*time=30*20=600m

To cross the bridge, the train will have to cover a distance equal to the sum of length of the bridge and length of the train.

speed of train = 30 m/stime taken = 20sdistance covered = 30 × 20 = 600m

now, length of bridge = 400mlength of train = 600 - 400 = 200m

Let the length of train be xthen , distance covered by train = 400m + xspeed = 30m/s time = 20sso , we know that , speed = distance/time distance = speed × time d(400+x) = 30 × 20400+x = 600x = 200m length of train = 200mhope this helps

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