SOLUTION: How many pounds of cement are needed to fill a cylindrical hole in the ground if it has a diameter of 16 inches and a depth of 36 in? Assume each cement bag weighs 40 lb and each b

Question 1091872: How many pounds of cement are needed to fill a cylindrical hole in the ground if it has a diameter of 16 inches and a depth of 36 in? Assume each cement bag weighs 40 lb and each bag filled a volume of 0.73 Ft cubed.
Answer by addingup(3677) (Show Source): You can put this solution on YOUR website!
Volume of a cylinder: Pi*r^2*h
radius = 1/2 diameter = 16/2 = 8
-----------------------------------------
Pi*8^2*36 = volume
Pi*64*36 = 7238.23
7238.23/0.73 = 9915 whole bags (9915.38 or 9915 19/50 if they want fractions)
Multiply bags times 40 to get your answer.
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