\input zb-basic \input zb-matheduc \iteman{ZMATH 2013b.00588} \itemau{Pritchard, Chris} \itemti{Ball in a box.} \itemso{Math. Sch. (Leicester) 41, No. 1, 25-27 (2012).} \itemab Summary: The article presents pairings of 2-dimensional (2-D) shapes occupying space inside other shapes to 3-dimensional (3-D) analogues. It provides the formula to obtain the proportion of volume of a cube occupied by a sphere in a cube. It cites the formula to obtain the volume of a sphere occupied a cube in a sphere. It notes formulas to obtain the ratio of the volumes of cylinders in a cube and similar scenarios. \itemrv{~} \itemcc{G30 I40} \itemut{solid geometry; volume; spheres; cubes; cylinders; cones; ratio; optimization; differentiation} \itemli{} \end