An airplane is flying on a flight path that will take it directly over a radar tracking station. if the distance between the tracking station and the airplane is decreasing at a rate of 400 miles per hour when the distance between them is 10 miles, what is the speed of the plane if the plane is always 3 miles above the ground?

The speed of planes is 419.31 miles per hours

Explanation:

Given that

S= 10 miles

And we have to find .

From triangle ABC

by differentiating with respect to time t

Now when S=10 miles then

x= 9.53 miles

So

So the speed of planes is 419.31 miles per hours

true is the correct answer

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