How much water will a cone hold that has diameter of 6 inches and a height of 21 inches

Answer: 197.92 square inches

step by step:

volume of a cone is V=πr^2h/3

1. divide diameter by 2 to find radius

r = diameter/2

r = 6"/2

r = 3"

2. plug in known values of r and h to find V

V = πr^2h/3

V = π (3") ^2 (21") / 3

V = π (9") (7")

V = 197.72 square inches