posted by Tom .
two runners jog around an oval path at constant rates, but in opposite direstions. one runner completes a lap every 10 minutes, and the other does a lap every 12 minutes. how many minutes elapse between consecutive meetings of the runners? express answer as a mixed number.
The time they meet must be a multiple of 10 AND of 12.
So what is the LCM for 10 and 12 ?