Two train 130 m and 170 m long are running in same direction on a parallel track at the speed of 74 km/hr and 38 km/hr respectively. How long the faster train will take to cross the slower train?
Answer & explanation
Correct answer: option 3
To cross the train, total distance to be traveled = Sum of length of trains
Distance = 130 + 170 = 300 m
Relative speed in same direction = S1 - S2 = 74 - 38 = 36 km/hr = 36 × \(\frac{5}{18}\) m/sec
⇒ Time to cross the slower train = \(\frac{Distance}{Relative\;Speed}\)
= \(\frac{300\;×\;18}{36\;×\;5}\)
= 30 Sec.