SOLUTION: Two cars started from the same point traveling in opposite direction. one traveled at half the speed of the other. after 5 hours they were 600 km apart. what is the speed of the

Algebra ->  Linear-equations -> SOLUTION: Two cars started from the same point traveling in opposite direction. one traveled at half the speed of the other. after 5 hours they were 600 km apart. what is the speed of the       Log On


   

Question 889023: Two cars started from the same point traveling in opposite direction. one traveled
at half the speed of the other. after 5 hours they were 600 km apart. what is the speed of the faster car?
Found 2 solutions by josgarithmetic, lwsshak3:
Answer by josgarithmetic(39625) About Me  (Show Source):
You can put this solution on YOUR website!
____________speed_______time_______distance
FAST_________2r_________5___________2r*5
SLOW__________r_________5____________r*5
TOTAL_______________________________600

2r%2A5%2Br%2A5=600
r%2A5%282%2B1%29=600
3r%2A5=600
5r=200
r=40, the slow car.

Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
Two cars started from the same point traveling in opposite direction. one traveled
at half the speed of the other. after 5 hours they were 600 km apart. what is the speed of the faster car?
***
let x=speed of slower car
2x=speed of faster car
distance=travel time*speed
..
5x+5*2x=600
15x=600
x=40
2x=80
speed of faster car=80 mph