Question
Train P measures 120 meters in length and moves at a
speed of 5 meters per second, while Train Q is 90 meters long and travels at a speed of 10 meters per second. If the two trains are moving towards each other from opposite directions, how much time will it take for them to completely pass one another?Solution
Relative speed = 5 + 10 = 15 m/sec Time taken by the 2 trains to cross each other = (120 + 90) / 15 = 14 seconds Hence, option d.
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