Question

1. How much time is will be required for an express train of length 400 m running at a
speed of 90 km/hr to cross a bridge of 1200 m lang?
11 60
2) 54 sec
3 56 sec
4 54 sec​

Answer 1

Answer:

there is something wrong with your options or the data given in the question

Step-by-step explanation:

speed of train = 90km/hr = 90×1000m/60×60sec = 25m/sec

dist needed to be covered= 1200+400m=1600m

time taken=1600/25sec=64 sec