Two trains each 250 m long are moving in opposite directions. They cross each other in 15 seconds. If the speed of one train is 83 km/h, find the speed of the other train.
Answer & explanation
Correct answer: option 1
Total distance covered while crossing = 250 + 250 = 500 m
Time taken = 15 sec
Relative speed (S1 + S2) = \(\frac{Total\;Distance}{time}\) = \(\frac{500}{15}\) = \(\frac{100}{3}\) m/sec
= \(\frac{100}{3}\) × \(\frac{18}{5}\) km/hr = 120 km/hr
Speed of one train = 83 km/hr (given)
Speed of other train = 120 - 83 = 37 km/hr