
Step-by-step explanation
Step 1
to find the total area , we need to divide the figure in a rectangle plus harf circle
so, the area for a rectangle is given by:

and the area for a circle is

but, we need the area of a half circle ,so

so, the toal area of th figure is


Step 2
Let
length= 28 in
width=21 in
radius = 8 in
replace and calculate

I hope this helps you