Two trains are moving in opposite directions at 60 km/hr and 90 km/hr.

Two trains are moving in opposite directions at 60 km/hr and 90 km/hr. Their lengths are 1.50 km and 1.25 km respectively. The time taken by the slower train to cross the faster train in seconds is?

Quiz

Answer/Solution

66

Steps/Work

Relative speed = 60 + 90 = 150 km/hr.
= 150 * 5/18 = 125/3 m/sec.
Distance covered = 1.50 + 1.25 = 2.75 km = 2750 m.
Required time = 2750 * 3/125 = 66 sec.
Answer: C

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Two trains are moving in opposite directions at km / hr and km / hr. Their lengths are km and km respectively. The time taken by the slower train to cross the faster train in seconds is?

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