A train of length 350 m crosses a bridge of length 250 m in 20 seconds. What is the speed of the train (in km/h)?
Answer & explanation
Correct answer: option 3
Speed of train = \(\frac{350 + 250 }{20}\) = \(\frac{600 }{20}\) = 30 m/sec
30 m/sec = 30 × \(\frac{18 }{5}\) km/h = 108 km/h