Perimeter story problem

Question

A Norman window has the shape of a rectangle surmounted by a semicircle. If the perimeter of the window is 28 ft. give the area A of the window in square feet when the width is 6.7 ft. Give the answer to two decimal places.

Answer 1

??????????? "summounted bi" is "on top" ???????????

rektangel with semiserel on top

wide=6.7

rim-length=28

half rim-length av serkel=pi*radius=3.14159* 3.35

=10.52433538

other 3 sides=wide+2*length=(28-10.52433538)

=17.47566462

2*length=17.47566462-6.7=10.77566462

leng=half that=5.387832311

area=leng*wide + half area av serkel

leng*wide=6.7*5.387832311=36.09847649...part 1 av area

half serkel area=pi*r*r/2=3.14159265*3.35*3.35/2=17.62826176

area=36.098476+17.62826176

=53.72673825

round2(53......)=53.73