Tom covers the distance d in d/V = 48 minutes = .8 hr.
Jim bikes 12 mph faster than Tom jogs arriving in d/(V + 12) = 18 minutes = .3 hr.
Since they cover the same distance d, .8V = .3V + 3.6.
Therefore, .5V = 3.6 or V = 7.2 mph
Then, d = 7.2(.8) = 5.76 miles.[/QUO