Answer:
Length of the base of a square pyramid is 4 inches
Step-by-step explanation:
the volume is 48 cubic inches and has a height of 9 inches.
Volume of the square pyramid formula is 
Where 'a' is the length of the base of a square and h is the height of the pyramid
volume = 48 and height =9, plug in the values in the formula
Volume of the square pyramid= 


Divide both sides by 3

Now take square root on both sides

Length of the base of a square pyramid is 4 inches