She needs to add 4 more layers to get the needed volume
How to find the volume of a solid object
The formula for calculating the volume of the box is given as:
V = lwh
l is the length = 5 in
Width = 3in
Height = 1 in
Volume of the box = 15 cubic inches
The number of layed needed = 75/15 - 1 = 4 layers
Hence she needs to add 4 more layers to get the needed volume
Learn more on volume of the box here: https://brainly.com/question/14957364
