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 :	Choose the correct choice
A) 3/4∏ B) 4/3∏ C) 5∏ D) 5/9∏ E) None
Sol.   Required volume = Volume of a sphere of radius 1 cm   =[4/3 ∏ * 1 * 1 * 1]cm³ = 4/3 ∏cm³   Answer 4/3∏
<result>B</result>
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 :