a new sidewalk will be 5 feet wide, 220 feet long, and filled to a depth of 9 inches(.75foot) with concrete. How many cubic yards of concrete are needed

Answer 1

5(220)/(9/12)

= 5(55)(9)/3

=15(55)

= 825 ft^3

= 825/3^3 yd^3

= 275/9

= 30 5/9 yd^3