Alphasia headed for the rodeo at 9 a.m. at 30 miles per hour. At 11 a.m. Bubba headed after her at 60 miles her hour. What time was it when Bubba caught Alphasia? Begin by drawing a diagram of distances traveled and writing the distance equation.
at t>=2 hours after 9 am, the two people have gone
30t and 60(t-2) miles
so it will take x hours for Bubba to catch up, where
30x = 60(x-2)
that is, 4 hours