Question

A train 360m long is running at a speed of 45km/hr. find the time taken by it to cross a 140m long tunnel

(using variation method).​

Answer 1

40 sec

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Answer 2

Answer:

Here is your answer :

Formula for converting from

km/hrtom/s:Xkm/hr=X×518m/s

Therefore,

Speed=45×518msec=252msec

Total distance to be covered=(360+140)m=500m

Formula for finding Time=DistanceSpeed

∴Requiredtime=(500×225)sec=40sec.

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