Answer:
The surface area is: 225 in²
Step-by-step explanation:
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Area of each triangular base:
[tex]\frac{1}{2}(7.5)(10)=37.5[/tex]
Area of the rectangular faces:
[tex]5 \times 10=50[/tex]
[tex]5 \times 12.5=62.5[/tex]
[tex]7.5 \times 5=37.5[/tex]
Add to find the surface area:
[tex]37.5+37.5+50+62.5+37.5=225[/tex]
Thus, the surface area is : 225²
