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Alexxandr [17]
3 years ago
13

The factory is building cardboard cereal boxes. Each box is 10 inches long, 3 inches wide, and 12 inches tall. How many square i

nches of cardboard will the factory need to build 50 boxes?
Mathematics
1 answer:
Neporo4naja [7]3 years ago
6 0

Answer:

18600 square inches

Step-by-step explanation:

To find the number of square inches of cardboard will the factory need to build 50 boxes, we find the total surface area of the cereal box which is A = 2(lw + lh + hw) where l = length of box = 10 inches, w = width of box = 3 inches and h = height of box = 12 inches.

Substituting the values of the dimensions into A, we have

A = 2(lw + lh + hw)

= 2(10 × 3 + 10 × 12 + 12 × 3) in²

= 2(30 + 120 + 36) in²

= 2(186) in²

= 372 in²

So, the area of one box is 372 in². The area of 50 boxes is thus, area of one box × 50 = 372 in² × 50 = 18600 in²

So we require 18600 square inches of cardboard to build 50 boxes.

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Step 1: Convert \frac{5\pi }{12}, which is in radians into degrees. To convert it multiply by \frac{180}{\pi }

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Step 3: Add the cos45 and cos30 to get cos5pi/12

\frac{\sqrt{2} }{2} +\frac{\sqrt{3} }{2} = \frac{\sqrt{2}+\sqrt{3}}{2}

Hope this helped!

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