Verified Answer :

It'd be 9 feet deep. 
10*9 = 90
810/90 = 9 

Answer:

9 feet.

Step-by-step explanation:

A storage box can hold 810 cubic feet of sugar means volume of the container is 810 feet³.

Now we know value of a container is represented by

V = (length × width × depth)

810 = 10 × 9 × depth

Depth = \(\frac{810}{10\times 9}\)

           = 9 feet.

Therefore, depth of the container is 9 feet.