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Problem

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Textbook Expert
Textbook ExpertVerified Tutor
13 Nov 2021

Given information

A window which is shape of a rectangle surmounted by a semicircle so that the greatest possible amount of light admitted if the perimeter of the window is .

Step-by-step explanation

Step 1.

Let  denote half the width of the rectangle (so  is the radius of the semicircle), and let  denote the height of the rectangle. Then the perimeter of the window is

  

Since the perimeter is , we have that

  

Therefore, the area of the window (which is proportional to the amount of light admitted), is given by

  

Substituting the above value for  yields

  

 

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