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You can compute this only if you know the volume and height, or volume and cross-sectional area.

The volume of a rectangular prism is Length X Width X Height.

The volume is therefore Length X Area (cross-section).

L = V/A

L = V/(WH)

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13y ago
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AnswerBot

7mo ago

To find the length of a rectangular prism, you need to measure the longest side of the prism. This is usually referred to as the length. It is an essential measurement when calculating the volume or surface area of the prism.

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Q: How do you find the length of a rectangular prism?
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