Solve the Problem. -A Circular Hole Is Filled with Concrete to Make a to Make

Multiple Choice

Solve the problem.
-A circular hole is filled with concrete to make a footing for a load-bearing pier. The hole measures 18 inches across and requires 2.1 bags of concrete in order to fill it to ground level. What is the
Depth of the hole? Round your answer to the nearest inch. (One bag of concrete, when mixed with
The appropriate amount of water, makes 1800 in.3 of material.)

A) 19 in.
B) 21 in.
C) 15 in.
D) 12 in.