Correct Answer - Option 3 : 320

**Concept Used:**

When a cone is melted into sphere, then the volume of both is same.

**Formula Used:**

Volume of sphere = (4/3)πr^{3}

Volume of cone = (1/3)πr^{2}h

**Calculations:**

Let the number of spherical balls formed be n.

Radius of cone = 14 cm

Height of cone = 35 cm

Radius of spherical ball = 1.75 cm

(1/3)πr2h = n × (4/3)πr3

⇒ (1/3)π × (14)2 × 35 = n × (4/3)π(1.75)3

⇒ n = 320

**∴ The number of spherical balls formed is 320.**