Question

A 350m long train passes over a 250m long bridge at a speed of 54 km/h .How long will it take it take to cross the bridge?

Answer 1

(4) 1/90 hr ≡ 40 sec

When the starting point of the train is at the start of bridge, the end part is 350 m away and the length of Bridge is 250 m

So total distance last part of train has to cover is 350+250 m i.e.,600 m

Speed of Train is 54 km/hr ≡ 15 m/s

Therefore, s= ut

600= 15 . t

t=40 s

1 s=1/(60*60) hr

40 s= 40/60*60 hr

⇒t = 1/90 hr

Answer 2

Answer:

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Step-by-step explanation:

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