SOLUTION: A plane travels from Chicago to Los Angeles at 560mph and a hour later a plane travels from Los Angeles to Chicago at 640mph. It is 1800 miles from Chicago to Los Angeles. How long

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Question 319676: A plane travels from Chicago to Los Angeles at 560mph and a hour later a plane travels from Los Angeles to Chicago at 640mph. It is 1800 miles from Chicago to Los Angeles. How long will it take for the first plane to pass the second plane? How far from Chicago will they be at thay time?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
A plane travels from Chicago to Los Angeles at 560mph and an hour later a plane travels from Los Angeles to Chicago at 640mph.
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It is 1800 miles from Chicago to Los Angeles. How long will it take for the first plane to pass the second plane?
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Chi to LA DATA:
rate = 560 mph ; time = x hrs ; distance = 560x miles
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LA to Chi DATA:
rate = 640 mph ; time = x-1 hrs ; distance = 640x-640 miles
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Solve: 560x + 640x-640 = 1800
1200x = 2440
x = 2.0333 hrs (passing time for Chi to LA Plane)
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How far from Chicago will they be at that time?
2.0333*560 = 1138.67 miles
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Cheers,
Stan H.
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