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stiv31 [10]
3 years ago
10

About how much cardboard is needed to make the inner tube for a roll of paper if the

Mathematics
1 answer:
Korvikt [17]3 years ago
8 0

Answer:

A=339.42\ cm^2

Step-by-step explanation:

The diameter of the roll of paper, d = 4.5 cm

Radius, r = 2.25 cm

Height of the roll of papaer, h = 24 cm

We need to find how much is needed to make the inner tube for a roll of paper. The surface area of a cylinder for inner tube is given by :

A=2\pi r h\\\\=2\times \dfrac{22}{7}\times  2.25\times 24\\\\=339.42\ cm^2

So, the required area is 339.42\ cm^2.

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I'm going to suppose that this is asking for the volume.
The formula to find volume for a cylinder is<span> V= pi r 2(squared) h
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Then plug the numbers in
So you should get V=3.14 x 10(squared) x 14
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</span> 

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2 years ago
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