P and Q start running in opposite directions on a circular track from the same point. Their speeds are 10 m/s and 8 m/s, respectively. After how much time will they meet if the length of the track is 1620 m?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 90 seconds.
Relative speed = 10 + 8 = 18 m/sec
Time = Distance/Speed
Time = 1620/18 = 90 seconds
Hence, they will meet after 90 seconds.