JEE Main 2019 Physics question
A passenger train of length 60 m travels at a speed of 80 km/hr. Another freight train of length 120 m travels at a speed of 30 km/hr. The ratio of times taken by the passenger train to completely cross the freight train when: (i) they are moving in the same direction, and (ii) in the opposite direction is:
Answer: (C)
Solution
Relative speeds 50 and 110 km/h for the same distance: ratio 110/50.