car A leaves at 8:00am at 40mph car B leaves 2 hours later at 60mph how long does it take car B to catch up to car A?
Let the time of car A = T
The time of car B = T - 2
40T = 60[T - 2]
T = 6 hours - from the time car A left.
6 - 2 = 4 hours - from the time car B left.
