- A9
- B8
- C10
- D12
Step-by-Step Solution
Relative speed = 40 + 50 = 90 km/h = 25 m/s; combined length = 250 m; time = 250 / 25 = 10 seconds.
Answer: C) 10
Two trains, 120 m and 130 m long, are running in opposite directions at 40 km/h and 50 km/h respectively. How many seconds do they take to completely cross each other?
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