A cylinderical pencil is sharpened to produce a perfect cone at one end with no over all loss of its length. The diameter of the pencil is 1 cm and the length of the conical portion is 2 cm. Calculate the volume of the shavings. Give your answer correct to two places if it is in decimal. `["Use "pi=355/113]`

A toy is made in the form of hemisphere surmounted by a right cone whose circular base is joined with the plane surface of the hemisphere. The radius of the base of the cone is 7 cm. and its volume is 3/2 of the hemisphere. Calculate the height of the cone and the surface area of the toy correct to 2 places of decimal. ("Take "pi=3""1/7)

A solid toy is in the form of a right circular cylinder with hemispherical shape at one end and a cone at the other end. Their common diameter is 4.2 cm and the height of the cylinderical and conical portions are 12 cm and 7 cm respectively. Find the volume of the solid toy. ["Use "pi=22/7]

A solid is in the form of a right circular cylinder with a hemisphere at one end and a cone at the other end. The radius of the common base is 8 cm and the heights of the cylinderical and conical portions are 10 cm and 6 cm respectively. Find the total surface area of the solid. " " [Use pi=3.14 ]

A solid toy is in the form of a right circular cylinder with a hemispherical shape at one end and a cone at the other end. Their common diameter is 4.2 cm. and height of the cyclindrical and conical portion are 12 cm. and 7 cm. respectively. Find the volume of the solid toy. " "[pi=22//7]