Volume of the cylindrical shape container =πr2h=π(10 cm)2(40 cm)=4,000πcm3. The container is 80 percent filled with punch, so the amount of punch in the container is 4,000πcm3×0.8=3,200πcm3.Since 1 fluid ounce =29.6 cm3, dividing the amount of cubic centimeters by 29.6 will give the number of fluid ounces. (3,200πcm3)÷29.6 cm3≈339.63 fluid ounces To find out the number of cups, divide 339.63 by 12.339.63÷12≈28.3Therefore, the largest number of 12 ounce cups that she can pour from the container is 28 .