A company that manufactures storage bins for grains made a drawing of a silo. The silo has a conical base, as shown below: The figure shows a silo shaped as a closed cylinder with a conical end. The diameter of the silo is 4 ft, the length of the cyl

Which of the following could be used to calculate the total volume of grains that can be stored in the silo?

π(6ft)2(2ft) + one over three π(10.5ft − 6ft)2(2ft)
π(2ft)2(6ft) + one over three π(10.5ft − 6ft)2(2ft)
π(6ft)2(2ft) + one over three π(2ft)2(10.5ft − 6ft)
π(2ft)2(6ft) + one over three π(2ft)2(10.5ft − 6ft)