Answer:
The width of the box is 12 inches
Explanations:
The formula for calculating the volume of a rectangular box is expressed as:

where:
• l is the ,length ,of the box
,
• w is the ,width, of the box
,
• h is the ,height ,of the box
Given the following parameters
• length = 18 inches
,
• heigh = 9 inches
,
• volume = 1,944 cubic inches
Substitute the given parameters into the formula to calculate the width of the box as shown:

Divide both sides by 162 to have:

Hence the width of the box is 12 inches