Two trains of length 100 m and 150 m are travelling in opposite directions at speeds of 75
Two trains of length 100 m and 150 m are travelling in opposite directions at speeds of 75 km/h and 50 km/h respectively. What is the time taken by them to cross each other?
(a) 7.4 seconds
(b) 7.2 seconds
(c) 7 seconds
(d) 6.8 seconds
Answer: (b) 7.2 seconds
Solution:-
The length of two trains 100 m & 150 m
The speed of two trains = 75 km/hr & 50 km/hr
Time taken both trains to cross each other = (.1 + .15)/(75 + 50)
= .25/125 hr
= .25 x 60 x 60/125
= 36/5
= 7.2 seconds
Hence, the correct answer is option (b) 7.2 seconds.