What is the radius of a sphere whose volume is 972 pi cubic yards?

V = 972pi cu.yds

V(sph) = (4/3) pi r^(3)

Hence

972pi cu.yds = (4/3) pi r^(3)

Cancel doewn by 'pi'

972 = 4r^(3) / 3

Multiply bo the sidex by '3'

Hence

2916 = 4r^(3)

Divide both sidesx by '4'

729 = r^(3)

Take the cube root of both sides

729^(1/3) = r

r = 9 yds.