alleryTrains 180 m and 220 m long move oppositely at 54 and 36 km/h. Time to cross completely?
A12 s
B20 s
C16 s
D25 s
Answer & Solution
Correct answer: C. 16 s
They cover 400 m at a relative speed of 90 km/h = 25 m/s, requiring 16 seconds.
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