A car A leaves the cafe traveling at 40 mph. Car B leaves the cafe 4 hours later, and travels at 60 mph. If they are both headed in the same direction, how far from the cafe will they meet?

Question

tkhunny · Answer

They meet when the distance travelled is the same.

Distance = Rate * Time

t is the time travelled by Car A

A: Distance = 40 mph * t

B: Distance = 60 mph * (t-4)

You can look at it another way...

How far has A gotten in 4 hours?  4 hrs * 40 mph = 160 miles
How fast is B catching A?  60 mph - 40 mph = 20 mph.
How long does it take to go 160 miles at 20 mph?