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Question

triangular prism is placed on the top of a rectangular prism such that they both share a common base. If both the prisms have the same volume, then how many times the height of the rectangular prism must be the height of the triangular prism?

A
one-fourth
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B
twice
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C
half
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D
thrice
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Solution

The correct option is B twice

Let be the height of the 𝑝 triangular prism.
Let 𝑙, 𝑤, and ℎ be the length, width, and the height of the rectangular prism.
Volume of the triangular prism = Volume of the rectangular prism

(12×w×p)×l=l×w×h

12×p=h

p=2h

Thus, the height of the triangular prism must be twice the height of the rectangular prism.

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