Sally and ben are running around a 400m circular track. Sally can run at 8m/s while ban can run at 6m/s. They start at the same time and run in the same direction. How far are they apart after 5 minutes?
d1 = r*t = 8 * (5*60) = 2400 m.
d2 = 6 * (5*60) = 1800 m.
d1-d2 = 2400 - 1800 = 600 m. Apart.