horses leave the starling line at the same time. trotting around a
circular track 600 yards in circumference. In one minute the 1st horse
covered 1/2 of the track, the second horse covers 1/5 of the track, and
the third horse covers 1/3 of the track. If the horses continue
trotting at the same speed until they all reach the starting lines at the
same time, how many minutes will they have trotted and how far will
each horse have traveled?