Question

What is the volume of the rectangular prism shown below if it is made of unit cubes?

• A. $24$ cu units
• B. $8$ cu units
• C. $10$ cu units
• D. $18$ cu units

Answer 1

The correct option is B $8$ cu units

Total unit cubes in the prism = Number of unit cubes in the base layer × Number of layers




These yellow cubes combine to make the base layer.
Number of unit cubes in the base layer $=4$
Number of layers $=2$
Total number of cubes $=$ Number of unit cubes in the base layer $\times$ Number of layers
$=4\times 2=8$ unit cubes
Volume of $1$ unit cube $=1$ cu unit
Volume of the rectangular prism $=$ Number of unit cubes $\times$ Volume of each unit cube
$=8\times 1=8$ cubic units