5.10 · Part II
Second Practice Form · Independent Application and Spiral Review
Volume of Rectangular Prisms · Volume
- Convert mixed numbers to improper fractions before multiplying
- Multiply numerators across, multiply denominators across: V = (l · w · h)
- Simplify the fraction and label with cubic units
- Volume of Rectangular Prisms (Volumen de prismas rectangulares) — The space inside a rectangular prism. Formula: V = Bh = l × w × h.
- Volume (Volumen) — How much space is inside a solid shape.
- Rectangular prism (Prisma rectangular) — A solid box shape with six flat rectangle sides.
- Cubic units (Unidades cúbicas) — The units used to measure space inside, like cubic inches.
- Dimensions (Dimensiones) — How long, how wide, and how tall a shape is.
- Base area (Área de la base) — The area of the bottom of a solid. Volume = base area × height.
- A common mistake in Volume of Rectangular Prisms is rounding a fractional edge length to the nearest whole number before multiplying, instead of using the exact fraction or decimal. For a box that is 2 ft × 1.5 ft × 1 ft, a student might round 1.5 down to 1 and compute 2 × 1 × 1 = 2 ft³, but the correct volume uses the exact edge length: 2 × 1.5 × 1 = 3 ft³ — a full cubic foot larger. Before you submit, ask: 'Did I multiply using the exact fractional or decimal edge length, or did I round it off first?'
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1 MULTIPLE CHOICE
(Lesson 5.5) A time capsule box has a volume of 120 cm³. Its length is 10 cm and width is 4 cm. What is its height?
- A3 cm
- B6 cm
- C4 cm
- D12 cm
FormulaPut the numbers inWork it outAnswer with its unit -
2 MULTIPLE CHOICE
(Lesson 5.6) A rectangular prism has l = 6 in, w = 4 in, h = 2 in. What is its surface area?
- A88 in²
- B48 in²
- C88 in³
- D44 in²
FormulaPut the numbers inWork it outAnswer with its unit -
3 MULTIPLE CHOICE
A time-capsule box measures 6 in long, 4 in wide, and 3 in tall. What is its volume?
- A72 cubic in
- B13 cubic in
- C24 cubic in
- D72 square in
FormulaPut the numbers inWork it outAnswer with its unit -
4 MULTIPLE CHOICE
Two storage boxes are ready to pack. Box A is 5 × 5 × 2 inches and Box B is 4 × 4 × 3 inches. Which box holds more?
- ABox A, because 50 cubic in is more than 48 cubic in
- BBox B, because 48 cubic in is more than 50 cubic in
- CThey hold the same amount
- DBox B, because it is taller
✏️ Workspace & Solution Steps -
5 MULTIPLE CHOICE
A prism with a 3/4 ft by 2 ft base has a volume of 9 ft³. What is its height?
- A4 ft
- B9 ft
- C6 ft
- D12 ft
FormulaPut the numbers inWork it outAnswer with its unit -
6 MULTIPLE CHOICE
What is the volume of a rectangular prism with l = 4 in, w = 3 in, h = 5 in?
- A60 in³
- B12 in³
- C60 in²
- D24 in³
FormulaPut the numbers inWork it outAnswer with its unit -
7 MULTIPLE CHOICE
A box has a volume of 36 cm³. Its length is 6 cm and width is 3 cm. What is the height?
- A2 cm
- B6 cm
- C3 cm
- D12 cm
FormulaPut the numbers inWork it outAnswer with its unit -
8 MULTIPLE CHOICE
How is volume different from area?
- AVolume measures 3D space (cubic units); area measures 2D surface (square units)
- BVolume uses square units; area uses cubic units
- CVolume only applies to cubes; area applies to all shapes
- DThere is no difference
✏️ Workspace & Solution Steps
Writing Task: Justify why your mathematical solution is accurate and complete.