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wlackey2020
04.12.2020 •
Mathematics
In the figure, the horizontal lines are parallel and
AB - BC - CD. Find JM. The diagram is not to
scale.
M
TA
1 13
B
K
C
J
D
a
9
b. 12
6
ds 3
Ο Α
so ti O O O O
OB
Solved
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Ответ:
204 square meters
Step-by-step explanation:
The surface area of the 4 wall of the 1st prism is the product of perimeter and its height: (2+8)*2*2 = 40 m2
The surface area of the top and bottom of the 1st prism is the 2 times the product of its width and height: 2*8*2 = 32 m2
Therefore the total surface area of the 1st prism is: 40+32 = 72 m2
Similarly, the surface area of the 4 wall of the 2nd prism is the product of perimeter and its height: (2+3)*2*11 = 110 m2
The surface area of its top and bottom is: 2*3*2 = 12 m2
Therefore the total surface area of the 2nd prism is: 110 + 12 = 132 m2
Overall, the total surface area of the composite is 132 + 72 = 204 m2