Bob starts out in his car traveling 30 mph. Four hours later, Mr. Speedster starts out from the
same point at 60 mph to overtake Bob. In how many hours will he catch him?	Answers.
A) 4 hours  B) 6 hours  C) 8 hours  D) 2 hours  E) 9 hours
Making the d = rt chart   d = r x t   Bob 30 x + 4   Mr. Speedster 60 x   Since Mr. Speedster traveled the least amount of time, we called that x. This is a TYPE A   problem, the distances are equal.   DBob = DSpeedster   30(x + 4) = 60x   30x + 120 = 60x   120 = 30x   4 = x It will take 4 hours to catch Bob.   correct answer 4 hours
<result>A</result>
Bob starts out in his car traveling 30 mph. Four hours later, Mr. Speedster starts out from the
same point at 60 mph to overtake Bob. In how many hours will he catch him?