-
Train A crosses a pole in 25 s and train B crosses the pole in 1 min 15 s . Length of train A is half the length of train B. What is the ratio between the speeds of A and B, respectively ?
-
- 3 : 2
- 3 : 4
- 4 : 3
- Could't be determined
Correct Option: A
Let the lengths of the trains A and B be a and 2a, respectively.
when a train crosses a pole, it covers the distance equal to its length.
∴ Required ratio of speeds = a / 25 : 2a /75 = 3 : 2
