How many cubic inches in a 4 inch diameter by 24 inch long cylinder?

Answer 1

To answer this question you need to figure out how many square inches are in the area of the circle which would then be multiplied by the length of the cylinder which will give you the total cubic inches. One method to determine square inches in a circle is D2 x .7854 (D being the diameter) 4" x 4" = 16" x .7854 = 12.5664" x 24" = 301.5936" A second way to determine the area of a circle would be to use pi R squared (pi x R X R). The radius is half of the diameter so R = 2 and

pi = 3.1415926535897932384626433832795 or 3.14 for short 3.14 x 2 x 2 = 12.56 x 24" = 301.44" In either case the total cubic inches would be nearly 301.5"