There are 2 trains P and Q moving in same direction. They are of equal length and cross a stationary pole in 5 seconds and 6 seconds respectively. In how much time would they cross each other?
Answer & explanation
Correct answer: option 3
Speed = \(\frac{Distance }{ Time}\)
Let the length of train be x
Speed of train P = \(\frac{x }{5}\)
Speed of train Q = \(\frac{x }{6}\)
Now, according to the question:
\(\frac{x }{5}\) - \(\frac{x }{6}\) = \(\frac{2x }{ Time}\)
\(\frac{x }{30}\) = \(\frac{2x }{ Time}\)
Time = 60 seconds