A right circular

Given, Diameter of right circular cylinder = 12 cm

Radius of right circular cylinder (r₁) =

= 6 cm

Height of right circular cylinder (h₁) = 15 cm

Volume of Cylindrical ice-cream container = r₁²h₁

= 6 6 15

= cm³

Diameter of cone = 6 cm

Radius of cone (r₂) =

= 3 cm

Height of cone (h₂) = 12 cm

Radius of hemisphere = radius of cone = 3 cm

⇒ Volume of cone full of ice-cream = volume of cone + volume of hemisphere

= r₂²h₂ + r₂³

= ( r₂²h₂ + 2r₂³)

= (3²× 12 + 2× 3³)

= (9 ×12 + 2 × 27)

= (108 +54)

= 162

= cm³

Let n be the number of cones full of ice cream.

⇒ Volume of Cylindrical ice-cream container = nVolume of one cone full with ice cream

= n

⇒ N =

⇒ n = 10

Hence, the required number of cones = 10