Identify the type of figure
1 answer:
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<h2>Answer:</h2>
A rectangle is a quadrilateral whose angles are all right angles. In this problem, we have a rectangle whose height and whose area is
. We don't know the other side of the rectangle, but let's call it
. So the area of a rectangle is:
The perimeter is the distance around a shape in two dimensions. For our rectangle, our perimeter is:
So our goal is to find . From the equation of the area:
If we substitute both this value and the height in the equation of the perimeter we get:
Let us call the rate as velocity. Now the velocities of the plane and of the wind are:
and 
:
Now
case 1:
case 2:
from equation 2:
substitute in equation 1:
Which is your velocity in still air (without wind)
Substituting back in:
you get:
which is the wind velocity
Now
case 1:
case 2:
from equation 2:
substitute in equation 1:
Which is your velocity in still air (without wind)
Substituting back in:
you get:
which is the wind velocity