cant solve...plz help

the surface areas of a sphere and a cube are equal.

Implies 4  r ²  / 6 l 2 =  1 , i.e r² / l2 = 3 / 2 pi , i.e r/ l = (3/ 2 pi) ^1/2

their volumes are in the ratio  4pi r 3/ 3 l2  =  4/ 3 pi ( 3/ 2 pi) ^3/2 =  6 / pi   =  1: 6/ pi