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?

Question

anonymous · Answer

you first need to find the km/h for 670km in 4 hours

anonymous · Answer

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:$$\{4(s-w)=530,4(s+w)=670\}$$$$w=\frac{35}{2} km/hr$$