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Sagot :
Answer:
- 92.4 ft²
Step-by-step explanation:
Total surface area comprises one rectangular base and two pairs of diferent triangles.
Area of rectangle
- A = lw
Area of triangle
- A = 1/2bh
Substitute and find
- A = 7*4 + 2(1/2*4*6.3) + 2(1/2*7*5.6) = 92.4 ft²
Area of base rectangle
- 7(4)
- 28ft²
Area of rest triangles
- 2(1/2BH)+2(1/2bh)
- BH+bh
- 4(6.3)+7(5.6)
- 64.56ft²
Now
TSA
- 64.56+28
- 92.56ft²
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