Hazel and emily fly from alantic to san diego. The flight from atlantic to san diego is against the wind and ?
takes 4 hr. The return flight with the wind takes 3.5 hr. If the wind speed is 40 mph , find the speed of the plane in still air. Show the equation to get the answer
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The distance travelled is certainly the same in each case, call it D. You know that the distance travelled will be the speed multiplied by the time. Call the plane's speed in still air V. When you're going against the wind, the speed that the plane makes over the ground is V-40, when it's going with the wind, it will go V+40. Then you can set up two equations: D = (V-40) x 4 D = (V+40) x 3.5 You can set these two equations equal to each other and solve for V.
