Question

Two buses are traveling to a state park. One bus leaves the terminal at 4:00 p.m. and travels at 40 miles per hour. The second bus leaves the terminal at 5:00 p.m. and travels at 60 miles per hour.

How much time passes until the second bus catches up with the first bus?

Answer 1

40t = 60(t-1)

distribute the right side

40t = 60t-60

subtract 60t from each side

-20t =-60

divide both sides by -20

t = -60 / -20 = 3

3 hours