Radius of the glass (r) = 4 cm
Height of the glass (h) = 15 cm
Radius of the vessel (R) = 15 cm
Height of the vessel (H) = 64 cm
No of glass fill=Voloume of vessel / Volume of glass
= πR2H/πr2h
=π×152×64/π ×42×15
= 225×64/16×15
=15×4
= 60 glasses