Volume Rectangular Prisms Worksheet - Free Printable

Let’s solve each problem step by step.

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Problem 1: Rectangular prism with l = 12 cm, w = 4 cm, h = 8 cm

Formula: Volume = length × width × height
So:
12 × 4 × 8

First, 12 × 4 = 48
Then, 48 × 8 = 384

✔ Volume = 384 cubic cm

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Problem 2: Cube with l = 5 mm, w = 5 mm, h = 5 mm

Since all sides are equal, it’s a cube — but we still use the same formula.

5 × 5 × 5

5 × 5 = 25
25 × 5 = 125

✔ Volume = 125 cubic mm

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Problem 3: Carl’s cooler — l = 2 ft, w = 4 ft, h = 2 ft

Volume = 2 × 4 × 2

2 × 4 = 8
8 × 2 = 16

✔ Volume = 16 cubic ft

*(Note: You were asked to draw and label — since this is text, we’ll skip drawing, but you should sketch a box and write “l=2ft”, “w=4ft”, “h=2ft” on the sides.)*

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Problem 4: Susan’s aquarium — h = 3 ft, w = 2 ft, l = 5 ft

Order doesn’t matter in multiplication. Let’s do:

5 × 2 × 3

5 × 2 = 10
10 × 3 = 30

✔ Volume = 30 cubic ft

*(Again, draw a box and label: length=5ft, width=2ft, height=3ft.)*

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Final Answer:

- First shape: 12 x 4 x 8 = 384 → The volume of the shape is 384 cubic cm.
- Second shape: 5 x 5 x 5 = 125 → The volume of the shape is 125 cubic mm.
- Carl’s cooler: The volume of the cooler is 16 cubic ft.
- Susan’s aquarium: The volume of the aquarium is 30 cubic ft.