Irene R. answered • 05/15/20
Tutor
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BS in Mechanical Engineering and Certified math teacher for 13 years
The volume of a rectangular pyramid can be found by multiplying the area of the rectangular base by the pyramid's height and dividing the product by 3:
V = Area of base • height
3
For a rectangular base, the area is calculated by multiplying the length by the width. Here the width is 9 inches. The length is unknown (x).
The height of the pyramid is 10 inches.
The volume is 480 cubic inches.
480 = x • 9 • 10
3
480 = 30x
16 inches = x
The length of the rectangular base is 16 inches.
