A train 280 m long is moving at 60 kmph. The time taken by the train to cross a tunnel 220 m long, is
Answer & explanation
Correct answer: option 3
Speed in m/s = 60 x \(\frac{5}{18}\) = \(\frac{50}{3}\) m/s
Speed = \(\frac{ Distance}{ Time}\)
\(\frac{50}{3}\) = \(\frac{ \text{280 + 220}}{ Time}\)
\(\frac{50}{3}\) = \(\frac{500}{ Time}\)
Time = \(\frac{\text{500 x 3}}{ 50}\)
Time = 30 seconds