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Question: A 150 m long train is moving with a uniform velocity of 45 km/h. The time taken by the train to cros...

A 150 m long train is moving with a uniform velocity of 45 km/h. The time taken by the train to cross a bridge of length 850 meters is

A

56 sec

B

68 sec

C

80 sec

D

92 sec

Answer

80 sec

Explanation

Solution

Total distance to be covered for crossing the bridge

= length of train + length of bridge

Time = Distance  Velocity =100045×518=80sec= \frac { \text { Distance } } { \text { Velocity } } = \frac { 1000 } { 45 \times \frac { 5 } { 18 } } = 80 \mathrm { sec }