**Find the radius of this cone. The volume is about 1408 feet cubed and the height inside is 21 feet.**

volume = 1408

height = 21

radius = sqrt( ( 3 * 1408 ) / ( PI * height ))

radius = 8

diameter = 8 * 2

diameter = 16

radius = 16 / 2

where,

d = diameter

A = area

C = circumference

r = radius

V = volume

LSA = lateral surface area

TSA = total surface area

s = slant height

h = height