SOLUTION: Hi Free Tutors! Here is my problem: A hole is 33 feet deep and 3 feet in circumference. How many yards of concrete will it take to fill it? Thanks! NR

You can put this solution on YOUR website!
First we need to find the radius. We can use the circumference formula to find r:

Plug in C=3 and solve for r



Now use the volume of a cylinder formula:

Plug in r=0.4775 and h=33 to find V


This means it will take 23.638 (cubic feet) to fill the hole. We must convert to cubic yards:
1 cubic foot=1/27 cubic yards


So the hole is 0.875481 cubic yards and it will take the same amount of concrete to fill it.