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kathleenirwin
17.10.2019 •
Mathematics
Find the surface area of the composite solid.
a.
680 in.2
b.
800 in.2
c.
920 in.2
d.
1,040 in.2
Solved
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Ответ:
Option B. 800 in²
Step-by-step explanation:
We have to find the surface area of the composite solid.
This solid is made up of two solids, Rectangular prism and a right angle triangular prism.
Now we will calculate surface area separately.
Surface area of rectangular prism = 2(lw + hl + hw)
But one side of lw is hidden so formula will be = 2(lw +hl + hw) - lw
where h = height = 10 in
w = width = 12 in
l = length = 10 in
Surface area of rectangular prism = 2(10×12 + 10×10 + 10×12) - 10×12
= 2(120 + 100 + 120) - 120
= 2(340) - 120 = 560 in²
Surface area of right angle triangular prism = 2(Rectangle sides)+ 2(triangular sides)
Surface area of triangular prism = 5×10 + 13×10 + 2(![\frac{1}{2})(5)(12)](/tpl/images/0328/9969/d9497.png)
= 50 + 130 + 60
= 240 in²
Now total surface area of the composite solid = surface area of rectangular prism + surface area of triangular prism
= 560 + 240 = 800 in²
Therefore, option B. 800 in² is the answer.
Ответ:
The mode of the age is 8 so their will be 3 birds with the age of 8 and 1 bird with the age of 14 and one bird with the age of 12 and another bird with the age of 10.
Step-by-step explanation: