A and B are running on a circular track of length 1400 metres. The speed of A is 33 m/sec and the speed of B is 47 m/sec. They start from the same point at the same time in the opposite direction. After how much time will they meet for the second time?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 35 sec.
Speed of A = 33 m/sec
Speed of B = 47 m/sec
Relative speed (opposite direction) = 33 + 47 = 80 m/sec
Length of track = 1400 m
Time for 1st meeting = 1400 ÷ 80 = 17.5 sec
Since they meet every 17.5 sec,
Time for 2nd meeting = 2 × 17.5 = 35 seconds