Problems on Trains · Question 22 · Medium
A train crosses a 400 m bridge in 50 seconds and a 250 m bridge in 40 seconds. What is the length of the train?
- 300 m
- 250 m
- 350 m
- 400 m
Answer and explanation
Answer: C. 350 m
Explanation: Speed is the same: (L + 400)/50 = (L + 250)/40, giving 40L + 16,000 = 50L + 12,500, so L = 350 m (speed 15 m/s).
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