The same amount of steel used to create eight solid steel balls, each with a radius of 1 inch, is used to create one larger steel ball. What is the radius of the ball?
Volume of 8 steel balls =(4 π r^3)/3≈4.18879 x 8 =33.51032 cubic inches.
33.51032 =(4 π r^3)/3
r^3 =[33.51032 /(4/3* π)
r^3 = 8
r = 8^(1/3)
r = 2 inches - the radius of big steel ball
+312 
