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nikdorinn [45]
3 years ago
15

Help with this question please

Mathematics
1 answer:
dimulka [17.4K]3 years ago
4 0

Answer:

A ≈ 28.27

Step-by-step explanation:

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Find the surface area of the composite solid.
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Answer:

281 ft^2

Step-by-step explanation:

We need to add each individual 2d shape together to find the surface area

Bottom: 5*12 = 60

Left side and right side: 4*5 = 20, 2 sides so 20*2= 40

Side facing us and side facing away from us: 12*4 = 48, 2 sides so 48*2=96

Top side that is cut by base of triangle: 7*5 = 35

Each triangle face: base = 5 (12-7), height = 5             1/2base * height so each triangle is .5*5*5 = 12.5; 4 triangles so 12.5*4=50

60+40+96+35+50=281

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254.5

Step-by-step explanation:

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vesna_86 [32]

Answer: 31

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add the 2 lengths of the given parts.

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