Question

Train traveling at a speed of 90 km/hr crosses a man standing on a platform in 8 seconds .find the time taken by the train ti cross the platform of length 250

Answer 1

Answer:

length of platform could be 250 m & not 250 k.m.

the man standing on a platform may be considered as a point the train is crossing.

speed of train =( 90×1000) / (60×60) m/sec = 90000/3600 = 900 / 36= 100/4 = 25m/ sec

distance train travels in 8 sec = 25 × 8 = 200 m

length of train = 200 m

length of platform = 250 m

total distance for train to fully cross = length of train + length of platform = 200 + 250 = 450 m

time taken to cross platform fully = distance/speed = 450 / 25 = 18 sec

Step-by-step explanation:

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