Metal spheres, each of radius 2 cm, are packed into a rectangular box of internal dimension 16 cm×8 cm×8 cm when 16 spheres are packed the box is filled with preservative liquid. Find the volume of this liquid .
Volume of 16 spheres =43×227×23×16=536.36 cm3
Volume of rectangle =16×8×8=1024 cm3
Volume of preservative liquid =1024b−536.36=487.64 cm3