Correct Answer - Option 2 : 7 cm

G**iven**

Circumference of the base of rod = 132 cm

Volume of rod = 3234 cm^{3}

**Formula used**

Circumference of circle = 2πr

Volume of cone = (1/3)πr^{2}h

**Calculation**

2πr = 132

⇒ 2 × (22/7) × r = 132

⇒ r = (132 × 7)/(2 × 22)

⇒ r = 21 cm

(1/3)πr^{2}h = 3234

⇒ (1/3) × (22/7) × 21 × 21 × h = 3234

⇒ h = (3234 × 7 × 3)/(22 × 21 × 21)

⇒ h = 7 cm

**∴ Height of cone is 7 cm**