In a circular race of 1200 m, A and B start from the same point, at the same time with speeds of 27 km/h and 45 km/h, respectively. After how much time will they meet again for the first time on the track when they running in the same direction?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 240 sec
Given that
The distance of the circular track ( D ) = 1200 m
⇒ The relative speed when they running in the same direction = 45 - 27 = 18 km/h = 5 m/s
Hence, the time when they meet for the first time = 1200/5 = 240 sec.