SOLUTION: An airplane flew 3.5 hours with a 40 mph head wind. The return trip with a tail wind of the same speed took 2.5 hours. Find the speed of the plane in still air
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Question 320874: An airplane flew 3.5 hours with a 40 mph head wind. The return trip with a tail wind of the same speed took 2.5 hours. Find the speed of the plane in still air Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website! An airplane flew 3.5 hours with a 40 mph head wind. The return trip with a tail wind of the same speed took 2.5 hours. Find the speed of the plane in still air
let speed in still air be x mph
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speed with head wind = x-40
speed with tail wind = x+40
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Distance = speed * time
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Headwind distance = 3.5(x-40)
Tailwind distance = 2.5(x+40)
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3.5(x-40) = 2.5(x+40)
3.5x-140=2.5x+100
x=140+100
x=240 mph speed of plane in still air
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