A Train 420 Metres Long is Running at a Speed of 80 km/hour. It will Pass a Bridge 180 metres Long in

  1. 15 seconds
  2. 27 seconds
  3. 13.5 seconds
  4. 7.5 seconds
Monis Rasool Professor Asked on 10th November 2015 in Maths.
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1 Answer(s)

Answer is 27 seconds

Explanation:-
The length of a train = 420 meters
The length of a bridge = 180 meters

Total length covered by the train = 420 + 180
 = 600 meters

The speed of the train = 80 km/hr
 = 80 x 5/18 m/sec

Time taken by the train to pass the bridge = 600 x 18/80 x 5 
 = 27 sec

Then, It will pass a bridge 180 meters long in 27 sec.

Hence, the answer is (2) 27 seconds

Monis Rasool Professor Answered on 10th November 2015.
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