We need to calculate the surface area of  the lateral faces of the square pyramid  without the base and the surface area of the rectangular prism  without one face
for the lateral faces of the square pyramid
we need to calculate the slant height
[tex]sh=\sqrt[]{3^2+2.5^2}=3.91ft[/tex]
then for the  lateral area
[tex]LA=4(\frac{(5)\cdot(3.91)}{2})=39.1ft^2[/tex]
then for the rectangular prism without the base
[tex]SA=5(5\cdot5)=125ft^2[/tex]
The total surface area that she needs to paint is
[tex]\text{TSA}=39.1+125=164.1ft^2[/tex]