SOLUTION: What is the number of hours it will take an automobile going forty-five miles per hour to catch up with an automobile moving at thirty miles per hour if the slower automobile start

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: What is the number of hours it will take an automobile going forty-five miles per hour to catch up with an automobile moving at thirty miles per hour if the slower automobile start      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


   



Question 107834: What is the number of hours it will take an automobile going forty-five miles per hour to catch up with an automobile moving at thirty miles per hour if the slower automobile starts one hour before the faster automobile?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
the slower automobile has a 30 mi. (30 mph X 1 h) head start

the faster automobile catches up at the rate of 15 mph (45 mph - 30 mph)

so it will take the faster automobile 2 h. (30 mi / 15 mph) to catch the slower automobile