Question

8. Three people - John, Mark and David run on the same track. First John starts,
15 seconds later Mark starts and 10 seconds after that David starts. John, mark
and David runs at 10 m/s, 15m/s and 20m/s respectively. Mark reaches the
finish line 10 seconds after David. Find the total time taken by john to
complete three rounds of tracks.​

Answer 1

Answer:

45 second s john to complete the 3 round of tracks

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