me assume yu meen KUBIK yards
serkel...24 ft wide...area=pi*12^2=144*pi=144*3.14159265...
area=452.3979816 square ft
2 inch deep=1/12=1/6 foor
volume=452.3979816/6=75.3996636 kubik ft
3 ft in 1 yard, so 1 kubik yard=3^3=27 kubik ft
volume=75.3996636/27=2.79258013 kubik yards
or bout 3