In a circular race of 840 m, A and B start running in the same direction at the same time from the same point at the speeds of 6 m/s and 12 m/s, respectively. After how much time will they meet next?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 140 s.
Distance = Speed × Time
When two people are running in same direction, relative speed = difference in the speeds
Relative speed of A and B = 12 - 6 = 6 m/s
Distance = 840
Time = = 140 s
Hence, A and B will meet after 140 s.