A train 108 m long moving at a speed of 50 km/hr crosses a train 112 m long coming from opposite direction in 6 seconds. The speed of the second train is
Answer & explanation
Correct answer: option 4
Speed = \(\frac{ Distance}{ Time}\)
Let the speed of 2nd train be x
So, according to the question
(50 + x) x \(\frac{5 }{18 }\) = \(\frac{\text{108 + 112}}{6}\)
(50 + x) = \(\frac{\text{108 + 112}}{6}\) x \(\frac{18}{5}\)
(50 + x) = \(\frac{\text{220}}{6}\) x \(\frac{18}{5}\)
50 + x = 132
x = 82 km/hr