Question

A new sidewalk will be 4 ft wide, 220 ft long and filled to a depth of 6 inches (0.5 foot) with concrete. how many cubic yards of concrete are needed?

Answer 1

To find the volume of concrete needed for a sidewalk, multiply the length, width, and depth. Then, divide the volume in cubic feet by 27 to convert it to cubic yards.

Step-by-step explanation:

To calculate the cubic yards of concrete needed, we need to find the volume of the sidewalk. The volume of a rectangular prism (which the sidewalk is) can be found by multiplying the length, width, and depth. In this case, the length is 220 ft, the width is 4 ft, and the depth is 0.5 ft. So the volume of the sidewalk is 220 ft x 4 ft x 0.5 ft = 440 cubic feet.

To convert cubic feet to cubic yards, we need to divide by 27 since there are 27 cubic feet in a cubic yard. So the final step is to divide 440 cubic feet by 27, which gives us approximately 16.3 cubic yards of concrete needed.