Answer :
[tex]\begin{gathered} \text{Area of A(Semi Circle): }\frac{\pi r^2}{2}\text{ r = }\frac{15}{2}\text{ = 7.5} \\ \text{ }\frac{3.142\times(7.5)^2}{2}\text{ }=88.36ft^2 \\ \\ \text{Area od B,Reactangle: L }\times\text{ B} \\ \text{ =25 }\times\text{ 15} \\ \text{ =375ft}^2 \\ \text{Area of C,(semi circle) : }\frac{\pi r^2}{2}\text{ , r = }\frac{15}{2}\text{ = 7.5} \\ \text{ }\frac{3.142\times(7.5)^2}{2}\text{ }=88.36ft^2 \\ \text{Total Area of the figure is} \\ \text{Area of A + Area of B + Area of C} \\ 88.36\text{ + 375 + 88.36} \\ =551.72\text{ }\approx551.6ft^2 \end{gathered}[/tex]