Final answer:
To find the number of cubic yards of concrete needed for a cement floor, convert the dimensions to yards and calculate the volume.
Step-by-step explanation:
To find the number of cubic yards of concrete needed, we first need to convert the dimensions of the floor to yards. Since 1 yard is equal to 3 feet, the length of the floor is 9 feet / 3 = 3 yards and the width of the floor is 12 feet / 3 = 4 yards.
Now, we need to convert the thickness of the floor to yards.
Since 1 yard is equal to 36 inches, the thickness of the floor is 6 inches / 36 = 0.1667 yards.
Now, we can calculate the volume of the floor by multiplying the length, width, and thickness. The volume of the floor is 3 yards * 4 yards * 0.1667 yards = 2 cubic yards.
Therefore, 2 cubic yards of concrete are needed to make the cement floor.