Consider a window the shape of which is a rectangle of height h surmounted a triangle having a height T that is 0.3 times the width w of the...

Consider a window the shape of which is a rectangle of height h surmounted a triangle having a height T that is 0.3 times the width w of the rectangle (as shown in the figure below). If the cross-sectional area is A, determine the dimensions of the window which minimize the perimeter.