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The length of a train is 50 m and it passes a pole in 2 seconds.

Asked by meghagrao 16th August 2008, 4:40 PM
Answered by Expert
Answer:

initial speed of the train = 50/2 = 25m/s

final speed = 3/5 (initial speed) = 3/5 ( 25)=15 m/s

average speed =u+v/2 = 25 + 15 /2 =40/2 =20m/s

 

This was with the assumption that the speed reduced uniformly from 25 to 15m/s while crossing the bridge.

Please write full queries to help avoid misinterpretations.

 

Time taken = Distance / Average speed = 550 / 20 = 27.5 seconds

Answered by Expert 18th August 2008, 4:53 PM
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