Area of the rectangle 1 = base x height
= 45 x 24
= 1080
Area of the circle = pi r^2
= (3.1416) (5)^2
= 78.54
Final area of the rectangle = 1080 - 78.54
a) = 1001.46 cm^2
b)
1080 -------------------- 100
78.54 ------------------ x
x = (78.54 x 100)/1080
b) x = 7.27 %