the volume of the greatest sphere that can be cut off from a cylindrical log of wood of base radius 1 cm and height 5 cm is :
sol . required volume = volume of a sphere of radius 1 cm = [ 4 / 3 ∏ * 1 * 1 * 1 ] cm ³ = 4 / 3 ∏ cm ³ answer b
volume_sphere(1)