Find the surface area of the composite solid. Write your answer as a decimal.

Answer:
283.5 cm²
Step-by-step explanation:
Base triangle + 3 rectangles + 3 top triangles
(½×8.7×10) + 3(10×6) + 3(½×4×10)
43.5 + 180 + 60
283.5
Answer:
[tex]283.5 {cm}^{2} [/tex]
Step-by-step explanation:
[tex]( \frac{1}{2} \times 8.7 \times 10) + 3(10 \times 6) + 3( \frac{1}{2} \times 4 \times 10) \\ 43.5 + 180 + 60 \\ = 283.5 {cm}^{2} [/tex]