- A300 m
- B400 m
- C600 m
- D450 m
Step-by-Step Solution
Relative km/h m/ → combined length m. Platform: km/h m/ m, minus 200 m → 400 m. (600 m forgets the train.)
Answer: B) 400 m
A train at 48 km/h completely crosses another train half its length, coming the other way at 42 km/h, in 12 seconds. It also passes a platform in 45 seconds. How long is the platform?
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