Question 819481: Two cars start from the same point and travel in opposite directions. The car traveling west leaves 1 hr later than the car traveling east. The eastbound car travels 40mph, and the westbound car travels 60mph. When they are 240 miles apart, how long had each car traveled?
Found 2 solutions by TimothyLamb, richwmiller:
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! head start:
s = d / t
d = s * t
d = 40 * 1 = 40 miles
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relative speed: 100 mph
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when 240 miles apart, the cars have both been moving during only 200 miles of that, due to the head start of the east bounder
t = d / s
t = 200 / 100
t = 1 hour
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so, when 240 miles apart, the east bound car has been moving for 2 hours and the west bound car for only 1 hour.
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Answer by richwmiller(17219)  (Show Source):
You can put this solution on YOUR website! Two cars start from the same point and travel in opposite directions. The car traveling west leaves 1 hr later than the car traveling east. The eastbound car travels 40mph, and the westbound car travels 60mph. When they are 240 miles apart, how long had each car traveled?
r*t=d
40*(t+1)+60t=240
t=2
check
40*3+60*2=240
ok
west bound 2 hours at 60 mph
east bound 3 hours at 40 mph
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