"A large window has the   shape of a rectangle surmounted by an equilateral triangle.
Channel: Doubtnut
Date: 2020-06-28

"A large window has the
 
  shape of a rectangle surmounted by an equilateral triangle. If the perimeter
 
  of the window is 12 metres find the dimensions of the rectangle that will
 
  produce the largest area of the window."