SOLUTION: At 9:00 am, two cars started from the same town and traveled north on the same road. One car averaged 45 mph, and the other car averaged 40 mph. In how many hours were the cars 30

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: At 9:00 am, two cars started from the same town and traveled north on the same road. One car averaged 45 mph, and the other car averaged 40 mph. In how many hours were the cars 30       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 517263: At 9:00 am, two cars started from the same town and traveled north on the same road. One car averaged 45 mph, and the other car averaged 40 mph. In how many hours were the cars 30 miles apart?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
At 9:00 am, two cars started from the same town and traveled north on the same road. One car averaged 45 mph, and the other car averaged 40 mph. In how many hours were the cars 30 miles apart?
----
Slower car DATA:
rate = 40 mph ; time = x hrs ; distance = t*r = 40x miles
----
Faster car DATA:
rate = 45 mph ; time = x hrs ; distance = t*r = 45x miles
-----
Equation:
greater distance - lesser distance = 30 miles
45x - 40x = 30
5x = 30
x = 6 hrs
===============
Cheers,
Stan H.
===============