Question
Train A, moving at 90 km/h, crosses a pole in 8 seconds.
Find the time it takes to cross another train of equal length, coming from the opposite direction at 90 km/h.Solution
Speed of Train A = 90 × 5/18 = 25 m/s
Length of Train A = 25 × 8 = 200 m
Length of Train B = 200 m
Speed of Train B = 90 × 5/18 = 25 m/s
Total length = 200 + 200 = 400 m
Relative speed = 25 + 25 = 50 m/s
Time = 400 / 50 = 8 seconds
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