SOLUTION: please help me find this answer. Two cars start at the same place at the same time and travel in opposite directions at average speeds of 60 mph and 72 mph. How many hours will i

Algebra ->  Customizable Word Problem Solvers  -> Finance -> SOLUTION: please help me find this answer. Two cars start at the same place at the same time and travel in opposite directions at average speeds of 60 mph and 72 mph. How many hours will i      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


   



Question 1115128: please help me find this answer.
Two cars start at the same place at the same time and travel in opposite directions at average speeds of 60 mph and 72 mph. How many hours will it take before the cars are 198 miles apart?

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Let the distance the first car covers equal d%5B1%5D and the second car d%5B2%5D.
So then you know,
R%2At=d
So find t when,
d%5B1%5D%2Bd%5B2%5D=198
R%5B1%5D%2At%2BR%5B2%5D%2At=198
60t%2B72t=198
132t=198
t=1.5hr