genyjoannerubiera
07.05.2020 •
Mathematics
If the surface area of the box of cereal below is 272 in?, find the length of the box.
CEREAL
12 in
2 in
1=?
Solved
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Ответ:
x = 8 inches length
Step-by-step explanation:
Dimension of box:
12 inches by 2 inches by length x
with total surface area = 272 square inches,
There are 6 faces.
Area = 2 *(12 * 2) + 2 *(2*x) + 2 *(12*x)
Area = 272 sq. in. = 48 + 4x + 24x
272 = 48 + 28x
272 - 48 = 28x
224 = 28x
x = 8 inches
Ответ:
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step-by-step explanation:
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