



 
Hi Rhonda, 18 feet is 18/3 = 6 yards and 33 feet is 33/3 = 11 yards. Thus the surface area is 6 × 11 = 66 square yards. If the thickness of the cover is T yards then the volume is 66 × T cubic yards. But the volume is 4 cubic yards so
and hence
There are 36 inches in a yard so 0.0606 yards is 0.0606 × 36 = 2.2 inches which is approximately 2 3/16 inches. Penny  


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