- A10
- B12
- C18
- D15
Step-by-Step Solution
Relative speed = 40 + 50 = 90 km/h = 25 m/s. Total length = 300 m. Time = 300 / 25 = 12 seconds.
Answer: B) 12
Two trains, 120 m and 180 m long, are running in opposite directions at 40 km/h and 50 km/h respectively. How many seconds will they take to cross each other?
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