Two trains of equal length are running on parallel lines in same direction at the rate of 46 km/h and 36 km/h. The faster train passes the slower train in 36 seconds. The length of the each train is:
Correct Answer: Option E
Hint: When two long objects cross each other,
⇒ The distance travelled by them = sum of the lengths of both objects
Let length of the each train is ‘l’ metres.
⇒ Relative speed of the faster train with respect to slower train = (46-36)= 10 km/h =(10×5/18) m/s
⇒ Total distance travelled by them = ‘l + l’ = ‘2l’ meters, Now,
⇒ Distance=speed × time,
Or, 2l = 10 × (5/18) × 36 = 100,
Or, l = 50 meters.
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