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OpenStudy (anonymous):
AN airplane flies 530km against the wind and 670 km with the wind in a total time of 4hr. The speed of the airplane in still air is 300km/h. What is the speed of the wind?
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OpenStudy (anonymous):
you first need to find the km/h for 670km in 4 hours
OpenStudy (anonymous):
r*t=d Let s and w be the speed of the plane in still air and w be the speed of the wind. Sole the following equations for w:\[\{4(s-w)=530,4(s+w)=670\}\]\[w=\frac{35}{2} km/hr\]
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