Two trains each 350m long are moving in opposite directions. They cross each other in 30 seconds. If the speed of one train is 50 km/h, find the speed of the other train.
Answer & explanation
Correct answer: option 2
Total distance covered while crossing = 350 + 350 = 700 m
Time taken = 30 sec
Relative speed (S1 + S2) = \(\frac{Total\;Distance}{time}\) = \(\frac{700}{30}\) = \(\frac{70}{3}\) m/sec
= \(\frac{70}{3}\) × \(\frac{18}{5}\) km/hr = 84 km/hr
Speed of one train = 50 km/hr (given)
Speed of other train = 84 - 50 = 34 km/hr