SOLUTION: two planes left an airport at noon. One flew east at a certain speed and the other flew east at twice the speed.. the planes were 2700 mi apart in 3 hours how fast was each plane
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Question 213329: two planes left an airport at noon. One flew east at a certain speed and the other flew east at twice the speed.. the planes were 2700 mi apart in 3 hours how fast was each plane flying? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! two planes left an airport at noon. One flew east at a certain speed and the other flew east at twice the speed.. the planes were 2700 mi apart in 3 hours how fast was each plane flying?
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1st plane DATA:
rate = r mph; time = 3 hrs ; distance = 3r miles
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2nd plane DATA:
rate = 2r mph ; time = 3 hrs ; distance = 6r miles
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Equation:
2nd plane distance - 1st plane distance = 2700 miles
6r - 3r = 2700 miles
3r = 2700
r = 900 mph (rate of the 1st plane)
2r = 1800 mph (rate of the 2nd plane)
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Cheers,
Stan H.
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