Volume of Cubes and Rectangular Prisms Math Worksheets - Free Printable

Let’s go through each problem one by one. We need to decide if the given dimensions make a cube or a rectangular prism.

What’s the difference?

- A cube has all three sides equal: Length = Width = Height (and they must be in the same unit!).
- A rectangular prism has at least two different side lengths — so not all three are equal.

We’ll check each row, convert units if needed, and see if L = W = H.

---

1. L = 40 cm, W = 40 cm, H = 40 cm
→ All same → Cube

2. L = 130 in, W = 120 in, H = 120 in
→ L is different → Rectangular Prism

3. L = 5 m, W = 5 m, H = 500 cm
→ Convert H to meters: 500 cm = 5 m → All same → Cube

4. L = 3 yd, W = 36 in, H = 9 ft
→ Convert all to inches:
- 3 yd = 3 × 36 = 108 in
- W = 36 in
- H = 9 ft = 9 × 12 = 108 in
→ So: 108 in, 36 in, 108 in → Not all same → Rectangular Prism

5. L = 5.2 m, W = 5.1 m, H = 5.20 cm
→ H is only 5.20 cm = 0.052 m → Very small! → All different → Rectangular Prism

6. L = 7 ft, W = 8 ft, H = 5 ft
→ All different → Rectangular Prism

7. L = 1.5 m, W = 1.5 m, H = 1.5 m
→ All same → Cube

8. L = 100 in, W = 254 cm, H = 100 in
→ Convert W to inches: 254 cm ÷ 2.54 = 100 in → So: 100 in, 100 in, 100 in → Cube

9. L = 98 cm, W = 98 cm, H = 97 cm
→ H is different → Rectangular Prism

10. L = 4 m, W = 40 cm, H = 4 m
→ Convert W to meters: 40 cm = 0.4 m → So: 4 m, 0.4 m, 4 m → Not all same → Rectangular Prism

---

Final Answer:
1. Cube
2. Rectangular Prism
3. Cube
4. Rectangular Prism
5. Rectangular Prism
6. Rectangular Prism
7. Cube
8. Cube
9. Rectangular Prism
10. Rectangular Prism