Two trains are moving in opposite directions with speeds of 35 m/s and 45 m/s respectively. From the time they are 12 km apart, how much time would they take to cross each other?
Answer & explanation
Correct answer: option 1
Relative speed ( when they moves in opposite direction ) = 35 + 45 = 80 m/sec
Distance to be covered = 12 km = 12000 m
Speed = \(\frac{Distance}{Time}\)
= \(\frac{12000}{80}\)
= 150 sec
= 2 minutes 30 seconds