Question

Calculate the volume of the solid, if each cube inside it is of 1 cu unit and the solid is not hollow.

• A. 18 cu units
• B. 36 cu units
• C. 12 cu units
• D. 24 cu units

Answer 1

The correct option is B 36 cu units


Dimensions of the figure:
Length = 4 units
Width = 3 units
Height = 3 units



Hence, volume of the first layer of unit cubes
$=length\times width\times \text{1 cu unit}$
$=4\times 3\times 1\text{cu units}$
= 12 cu units


Since the solid is not hollow, it is fully made of unit cubes.

$\therefore$ Volume of the solid
$=\text{volume of the first layer of unit cubes}\times \text{height}$
$=12\times 3\text{cu units}$
= 36 cu units