Question

A train is 100m long and is moving with a speed of 72KMPH. the time taken by the train to cross a bridge of length 0.5KM is​

Answer 1

Answer:

30 seconds

Explanation:

1km=1000m

0.5km=500m

speed of train=72*5/18 =20

time=(length of train + length of bridge)/speed of train

time=(100+500)/20

600/20=30sec

Answer 2

Answer:

Is it 3secs

Explanation:

Total dist = (0.1 + 0.5)km= 0.6km

Total speed = 72km/hr

Thus total time = dist/speed = 0.6/72= 1/1200hrs = (3600×1/1200)seconds = 3secs