SOLUTION: Bob starts out in his car travelling 30mph. Four hours later, Mr. Speedster starts out from the same point at 60mph to overtake Bob. In how many hours will he catch him?

SOLUTION: Bob starts out in his car travelling 30mph. Four hours later, Mr. Speedster starts out from the same point at 60mph to overtake Bob. In how many hours will he catch him?

Algebra.Com

Question 910992: Bob starts out in his car travelling 30mph. Four hours later, Mr. Speedster starts out from the same point at 60mph to overtake Bob. In how many hours will he catch him?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
Gaining speed 60 -30= 30 mph
Headstart 30*4 =120 miles
Time to catch up 120/30=4 hours
Algebraic solution
30(t+4)=60t
30t+120=60t
120=60t-30t
120=30t
t=4 hours
Distance to meeting 4*60=240 miles
code drt1

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