<PRE><B>Question 446208</B>
9am a plane leaves Chicago heading west. 
at 11am a second plane leaves Chicago heading west and traveling 50 mph faster than the first plane. 
the second plane overtakes the first plane in 5 h. 
what is the rate of the first plane

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2nd plane DATA:
time = 5 hr ; rate = r+50 mph ; distance = r*t = 5r+250 miles
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1st plane DATA:
time = 5+2 = 7 hr; rate = r mph ; distance = 7r miles
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Equation:
distance = distance
5r+250 = 7r
2r = 250
r = 125 mph (rate of the 1st plane)
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Cheers,
Stan H.
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