Answer:
213 ft²
Step-by-step explanation:
[tex]\textcolor{steelblue}{\text{Area of rectangle = length}\times\text{breadth}}[/tex]
Area of figure
= area of rectangle A + area of rectangle B +area of rectangle C
Rectangle A
Length= 12 ft
Breadth= 8 ft
Area= 12(8)= 96 ft²
Rectangle B
Length= 3 ft
Breadth= 3 +8= 11 ft
Area= 3(11)= 33 ft²
Rectangle C
Length= 4 ft
Breadth= 21 ft
Area= 4(21)= 84 ft²
Thus, area of figure
= 96 +33 +84
[tex] = \textcolor{red}{213 \: \text{ft}^{2} }[/tex]
