TO CALCULATE THE AREA OF A CIRCLE

 

Divide diameter in half to get the Radius*

 

Multiply Radius by itself

 

Multiply total by 3.14

 

Multiply by depth in feet to get cubic feet

 

Divide by 27 to determine cubic yardage

 

 

 

EXAMPLE 18’ X  3’ DEEP

 

Divide 18’ in half = 9’

 

9’X 9’ = 81 Square feet

 

81 X 3.14 = 254.34 = Area of circle

 

254.34 X 3’ (depth) = 763.02 Cubic feet

 

763.02 Divided by 27 = 28.26 Cubic yards