How to Find the Volume of a Rectangular Prism

Step-by-step solution

1. Write the volume formula.

   $$V = l \times w \times h$$

   Why: Volume is the space inside a box with three dimensions.

2. Substitute the three lengths.

   $$V = 4 \times 3 \times 5$$

   Why: The order of the three numbers does not change the product.

3. Multiply.

   $$V = 60$$

   Why: 4 times 3 is 12, and 12 times 5 is 60.

4. Add the cubic unit.

   $$60\ \text{cubic units}$$

   Why: Volume measures a three-dimensional space.

Practice problems

Use the same method. Work each problem on paper, then open the answer to check.

1. 1

   $2 \times 3 \times 4$

   Show answer

   $V = 24$

2. 2

   $5 \times 5 \times 2$

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   $V = 50$

3. 3

   $6 \times 2 \times 3$

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   $V = 36$

4. 4

   $10 \times 1 \times 7$

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   $V = 70$

5. 5

   $3 \times 3 \times 3$

   Show answer

   $V = 27$