Question

Find the volume of the rectangular prism shown below, if the volume of each unit cube is $1$ cu cm.

• A. $26$ cu cm
• B. $18$ cu cm
• C. $12$ cu cm
• D. $32$ cu cm

Answer 1

The correct option is B $18$ cu cm

Number of unit cubes in the base layer $=$ Number of cubes along the length $\times$ Number of cubes along the width
$=3\times 3=9$ cubes
Number of layers in the prism $=2$
Total number of unit cubes in prism $=$ Number of unit cubes in base layer $\times$ Number of layers
$=9\times 2=18$ cubes
Volume of the prism $=$ Volume of a single cube $\times$ Number of cubes
$=1\times 18=18$ cu cm