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 1.5 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) 11 in.
B) 8 in.
C) 15 in.
D) 17 in.

Question

Quizplus · Accepted Answer

The volume of the hole is (18/2)^2 * pi * h = 1800, where h is the depth of the hole. Solving for h gives h = 11.

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