The length of the circular track = 2*π*r = 2 = 26400 metre.
Time taken by A to complete one lap = 26400/10 = 2640 seconds = 44 minutes
Time taken by B to complete one lap = 26400/20 = 1320 seconds = 22 minutes
Time after which both will meet at the starting point = L.C.M of (time taken by A to complete 1 lap, time
taken by B to complete 1 lap)
⇨ Time after which both will meet at the starting point = L.C.M (44, 22) = 44 minutes
Thus the meeting time is 6:30 am + 44 minutes = 7:14 am
[At 7:14 am, A would have completed 1 full lap and B would have completed 2 laps]
For better understanding on this topic, please see the kitabee video on special equation
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