SOLUTION: A plane can fly 560 miles in the same time as it takes a car to go 240 miles. If the car travels 80 mph slower that the plane l, find the speed of the plane.

Question 1085049: A plane can fly 560 miles in the same time as it takes a car to go 240 miles. If the car travels 80 mph slower that the plane l, find the speed of the plane.
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A plane can fly 560 miles in the same time as it takes a car to go 240 miles. If the car travels 80 mph slower that the plane l, find the speed of the plane.
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P = plane's speed
C = Car's speed
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P*t = 560
C*t = 240
P = C + 80
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t = 560/P = 240/(P - 80)
240P = 560*(P - 80)
240P = 560P - 44800
320P = 44800
P = 140 mi/hr
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