A cylindrical pencil sharpened at one edge is the combination of

A solid metallic sphere of diameter 28 cm is melted and recast into a number of smaller cones, each of diameter and height 3 cm. Find the number of cones so formed.

A cylindrical vessel with internal diameter 10 cm and height 10.5 cm is full of water. A solid cone of base diameter 7 cm and height 6 cm is completely immersed in water. Find the volume (i) displaced out of the cylinder (ii) left in the cylinder.

A shuttlecock used for playing badminton is the combination of

A funnel is the combination of