



 
David, You have dimensions of square yards, feet and inches and you are looking for an answer in square feet so the first step is to convert yards and inches to feet. There are 12 inches in a foot so 4 inches is 4/12 = 1/3 feet. There are 3 feet in a yard so a cubic yard is 3 × 3 × 3 = 27 cubic feet. You don't know how wide the slab of concrete is so let's say it's W feet wide. The volume is then
But you know the volume is 27 square feet so W = 27 feet. I hope this helps,  


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 