5th Grade Volume of Rectangular Prisms Worksheet Solutions (PDF)

Each answer shows the layers or the formula, the multiplication, and the final volume with cubic units. For composite solids, check that you added the two volumes.
Grade 5 · Common Core State Standards: 5.MD.C.3, 5.MD.C.4, 5.MD.C.5
Exercise 1 – Count the cubes
One layer has \(3\times2=6\) cubes. There are 2 layers.
\(6\times2=12\).
12 cubic units
Exercise 2 – Layers of cubes
(a) \(4\times3=12\) cubes per layer.
(b) 3 layers.
(c) \(12\times3=36\).
36 cubic units
Exercise 3 – Volume in cubic feet
Use \(V=l\times w\times h\).
\(V=5\times3\times2=30\).
\(30\text{ ft}^{3}\)
Exercise 4 – Volume in cubic centimeters
Use \(V=l\times w\times h\).
\(V=6\times4\times5=120\).
\(120\text{ cm}^{3}\)
Exercise 5 – Volume in cubic inches
Use \(V=l\times w\times h\).
\(V=8\times2\times7=112\).
\(112\text{ in}^{3}\)
Exercise 6 – Base area times height
Use \(V=B\times h\).
\(V=24\times5=120\).
120 cubic units
Exercise 7 – Using the base area
\(V=B\times h=18\times4=72\).
\(72\text{ in}^{3}\)
Exercise 8 – Find the height
Base area: \(6\times5=30\) square cm.
\(30\times h=90\), so \(h=90\div30=3\).
Check: \(6\times5\times3=90\).
3 cm
Exercise 9 – Find the missing edge
\(15\times h=105\), so \(h=105\div15=7\).
7 ft
Exercise 10 – Volume of a cube
A cube has equal edges, so \(V=4\times4\times4=64\).
\(64\text{ m}^{3}\)
Exercise 11 – Prism from a picture
Base: \(5\times2=10\) cubes. Height: 3 layers.
\(10\times3=30\).
30 cubic units
Exercise 12 – Fish tank
\(20\times10=200\) is the base area.
\(200\times12=2{,}400\).
\(2{,}400\text{ in}^{3}\)
Exercise 13 – Compare two boxes
Box A: \(3\times7\times4=84\). Box B: \(6\times5\times3=90\).
\(90-84=6\).
Box B is greater by \(6\text{ in}^{3}\)
Exercise 14 – Two prisms joined
Prism A: \(4\times3\times2=24\). Prism B: \(2\times3\times1=6\).
\(24+6=30\).
30 cubic units
Exercise 15 – Step-shaped solid
Prism A: \(7\times4\times3=84\). Prism B: \(3\times4\times2=24\).
\(84+24=108\).
108 cubic units
Exercise 16 – Packing cubes
Box volume: \(12\times9\times6=648\) cubic inches. One cube: \(3\times3\times3=27\) cubic inches.
\(648\div27=24\). Check by edges: \(4\times3\times2=24\).
24 cubes
Exercise 17 – Filling a pool
Pool volume: \(20\times10\times4=800\) cubic feet.
\(\frac{3}{4}\times800=600\).
\(600\text{ ft}^{3}\)
Exercise 18 – Storage bin
Base area: \(12\times6=72\).
\(360\div72=5\).
Check: \(72\times5=360\).
5 inches
Exercise 19 – Planter soil
First box: \(6\times3\times2=36\). Second box: \(3\times3\times1=9\).
Total: \(36+9=45\) cubic feet.
Cost: \(45\times4=180\) dollars.
$180
Exercise 20 – Cubes in a box
(a) \((10\div2)\times(8\div2)=5\times4=20\) cubes.
(b) \(6\div2=3\) layers.
(c) \(20\times3=60\) cubes.
Check: each cube is \(2\times2\times2=8\) cubic cm, and \(60\times8=480=10\times8\times6\).
(a) 20; (b) 3; (c) 60 cubes
All Grade 5 chapters: Grade 5 math.
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