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Blitzx
19.02.2020 •
Mathematics
Please help me thanks...
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Ответ:
144.44 in² is the closest amount of paper she will use to wrap the gift.
Solution:
The given net is the shape of the cylinder.
Diameter of the circle = 4 in
Radius of the circle = 4 ÷ 2 = 2 in
Width of the container = 10.5 in
Length of the container is same as the circumference of the circle.
Area of the circle =![\pi r^2](/tpl/images/0516/0261/8463b.png)
=![3.14\times 2^2](/tpl/images/0516/0261/47de2.png)
= 12.56 in²
Area of the 2 circles = 2 × 12.56 = 25.12 in²
Area of the rectangle = circumference × height
=![2 \pi r\times h](/tpl/images/0516/0261/a6c46.png)
=![2 \times 3.14 \times 2\times 10.5](/tpl/images/0516/0261/fa24f.png)
= 131.88 in²
Area of the net of the container
= Area of the circles + Area of the rectangle
= 12.56 in² + 131.88 in²
= 144.44 in²
Area of the net of the container = 144.44 in²
Hence 144.44 in² is the closest amount of paper she will use to wrap the gift.
Ответ: