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As shown in the following figure, a space diagonal in a rectangular pr

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As shown in the following figure, a space diagonal in a rectangular pr [#permalink]

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New post 26 Apr 2018, 13:29
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As shown in the following figure, a space diagonal in a rectangular prism is a line that goes from a vertex of the prism, through the center of the prism to the opposite vertex. What is the length of the space diagonal of a 3 by 4 by 12 rectangular prism?

(A) 25
(B) 15
(C) 13
(D) 11
(E) 5


Attachment:
2018-04-27_0024_001.png
2018-04-27_0024_001.png [ 11.43 KiB | Viewed 398 times ]

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As shown in the following figure, a space diagonal in a rectangular pr [#permalink]

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New post 26 Apr 2018, 15:32
The formula for the length of the space diagonal of a rectangular prism is \(\sqrt{L^2+H^2+W^2}\)

where L = Length, H = Height and W = Width

\(\sqrt{3^2+4^2+12^2}\)

Hence option C = 13 is the answer.
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Re: As shown in the following figure, a space diagonal in a rectangular pr [#permalink]

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New post 27 Apr 2018, 00:34
Bunuel wrote:
Image
As shown in the following figure, a space diagonal in a rectangular prism is a line that goes from a vertex of the prism, through the center of the prism to the opposite vertex. What is the length of the space diagonal of a 3 by 4 by 12 rectangular prism?

(A) 25
(B) 15
(C) 13
(D) 11
(E) 5


Attachment:
2018-04-27_0024_001.png


Ans: C

Three sides are given for the given figure and we know that for space diagonal the formula for calculating the value is = sqrt of (a^2+b^2+c^2)
by this ans is 13

Ans C
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Re: As shown in the following figure, a space diagonal in a rectangular pr [#permalink]

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New post 27 Apr 2018, 09:42
Answer (C) 13
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Re: As shown in the following figure, a space diagonal in a rectangular pr [#permalink]

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New post 30 Apr 2018, 16:29
Bunuel wrote:
Image
As shown in the following figure, a space diagonal in a rectangular prism is a line that goes from a vertex of the prism, through the center of the prism to the opposite vertex. What is the length of the space diagonal of a 3 by 4 by 12 rectangular prism?

(A) 25
(B) 15
(C) 13
(D) 11
(E) 5


Attachment:
2018-04-27_0024_001.png


diagonal^2 = length^2 + width^2 + height^2

d^2 = 3^2 + 4^2 + 12^2

d^2 = 9 + 16 + 144

d^2 = 169

d = 13

Answer: C
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Re: As shown in the following figure, a space diagonal in a rectangular pr   [#permalink] 30 Apr 2018, 16:29
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