<PRE><B>Question 1016986</B>
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3400 mi/4hrs = 850 mph
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The combined speeds of both planes is 850 mph.
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S=speed of slower plane; F=speed of faster plane=S+50 mph
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S+F=850mph
S+(S+50mph)=850mph
2S=800mph
S=400mph
F=S+50mph=400mph+50mph=450mph
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ANSWER: The slower plane is traveling 400 mph and the
faster plane is traveling 450 mph.
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