1.

Find the length of acro bridge in which a train140 m long travelling at 54 kmph can cross in 30 seconds

Answer»

ong>Step-by-step EXPLANATION:

SPEED of train = 54 km /hr

1 km = 1000 m

1 hr = 3600 sec

Speed of train in m/s = 54 * 1000 / 3600

= 15 m/s

DISTANCE = Speed * time

=> Distance covered in 30 secs = 15 * 30 = 450 m

Length of train = 140 m

Length of BRIDGE = 450-140 = 310 m

Length of bridge = 310 m

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