Question

The lengths of trains A and B are in the ratio of 2 : 3. They pass a static pole in 4 seconds and 5 seconds, respectively. In what time (in seconds) will they cross each other when they move in the same direction?
1. 45
2. 48
3. 50
4. 40

Answer 1

Correct Answer - Option 3 : 50

Given;

The ratio of the length of the train is 2 : 3

Calculation:

Let be assume length of the train of A and B is 2x and 3x respectively.

⇒ Speed of train A = 2x/4, Speed of train B = 3x/5

⇒ Speed in same direction = 3x/5 - 2x/4 = 0.10x

⇒ Total time taken to cross each other = (2x + 3x)/0.10x = 5/0.10 = 50 second

∴ The required result will be 50 second.