Question

Please help me ASAP! Need to find the surface area of both shapes together.

Answer 1

1,108in~2

Explanation:

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Answer 2

The surface area is
`SA=1,108\ in^(2)`

Explanation:

we know that

The surface area of the composite figure is equal to

The lateral area of the rectangular prism plus the area of the base of the rectangular prism plus the area of the two triangular faces of triangular prism plus the area of two rectangular faces of the triangular prism

so

`SA=2(12+20)(5)+(12)(20)+2[(1)/(2)(12)(9)]+2(20)(11)`

`SA=320+240+108+440`

`SA=1,108\ in^(2)`