The speed of the plane in still air will be 215 miles per hour.
It is defined as the operation in which we do the addition of numbers, subtraction, multiplication, and division. It has basic four operators that are +, -, ×, and ÷.
It is given that, a plane may go 700 miles with the wind and 375 miles against it in the same period of time. If the wind is blowing at 65 mph,
Suppose x represents the speed of the plane in still air.
The speed of the plane with the wind is x+65 and the speed of the plane against the wind is x-65
Travel time = distance/speed
375/x-65=700/x+65
375(x+65)=700(x-65)
375x+24375=700x-45500
700x-375x=24375+45500
325x=69875
x=69875/325
x=215
Thus, the speed of the plane in still air will be 215 miles per hour.
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