Problems on Trains · Question 15 · Hard
Problems on Trains question 15
Two trains running in opposite directions cross a man standing on the platform in 27 seconds and 17 seconds respectively, and cross each other in 23 seconds. What is the ratio of their speeds?
- 2 : 3
- 3 : 4
- 3 : 2
- 27 : 17
Answer and explanation
Answer: C. 3 : 2
Explanation: Lengths are 27x and 17y for speeds x, y. Crossing each other: 27x + 17y = 23(x + y), so 4x = 6y and x : y = 3 : 2.
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