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11Alexandr11 [23.1K]
2 years ago
6

A cuboid in which the sum of its dimensions is 9 cm., then the sum of its edge lengths - cm. (18 or 27 or 36 or 45)​

Mathematics
1 answer:
ser-zykov [4K]2 years ago
5 0

The number of sides or edges on a cuboid  are twelve, and the sum of the

edges is the sum of the twelve edges.

The sum of the edge lengths = <u>36 cm</u>

Reasons:

The given parameters are;

The sum of the dimension of the cuboid = 9 cm

Required:

The value sum of the dimension of the edges the cuboid.

Solution:

The dimensions of a cuboid are; Length, <em>l</em>, width, <em>w</em>, and height, <em>h</em>

We get;

l + w + h = 9

The number of times that each dimension appear = 4 times

4 edges with the same length as the height, <em>h</em>

4 edges with the same length as the width, <em>w</em>

4 edges with the same length as the length, <em>l</em>

The sum of the edge lengths is therefore; Sum Edges = 4·l + 4·w + 4·h

Which gives;

Sum Edges = 4·l + 4·w + 4·h = 4 × (l + w + h) = 4 × 9 = 36

The sum of the edge lengths = <u>36 cm</u>.

Learn more here:

brainly.com/question/12978944

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2 years ago
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GalinKa [24]

This should help you here are the steps of your problem :)


2*(1/2)*r+2*r+1 = 9*(1/10) // - 9*(1/10)


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3*r = -1/10 // : 3


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