Posted by Kyle on Sunday, August 15, 2010 at 7:45pm.
Four identical metal spheres, each with radius 6 cm, are melted and reshaped into one big sphere. Fine the radius of the new sphere.

Geometry  Ms. Sue, Sunday, August 15, 2010 at 7:49pm
Find out the volume of each sphere.
V = (4/3)(pi)(r^3)
Multiply by 4.
Use the same formula to find the radius of the new sphere.