Two trains - A and B- having the lengths 195 m and 165 m, respectively, are running in the same direction on parallel lines. If the speed of A and B be 77 km/h and 85 km/h, respectively, what will be the time (in seconds) taken by them to cross each other?
Answer & explanation
Correct answer: option 1
Total distance = 195 + 165 = 360m
Relative speed = 85 - 77 = 8 km/h
8km/h = \(\frac{20}{9}\) m/sec
Time = \(\frac{Distance }{Speed }\)
= \(\frac{360 × 9 }{20 }\)
= 162 sec