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babas97
20.07.2019 •
Mathematics
Christie pilots her plane for 320 miles against a headwind in 2 hours. the flight would take 1 hour and 36 minutes with a tailwind of the same speed. find the headwind and the speed of the plane in still air
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Ответ:
Let us say that s is the speed of the plane and x is the speed of the headwind so that:
s – x = (320 / 2) = 160
s + x = (320 / 1.6) = 200
So we got two equations:
s – x = 160
s + x = 200
Adding the two equations:
2s = 360
s = 180 mph (speed of plane)
So x is:
x = 180 – 160
x = 20 mph (headwind)
Ответ:
0.3 is correct I hope it helps you.