Correct Answer - Option 3 : 2.8 cm

**Given:**

Radius of sphere = 2.1 cm

Radius of cylinder = 2.1 cm

**Formula used:**

Volume of sphere = 4/3 × πr^{3}

Volume of cylinder = πr^{2}h

**Solution:**

⇒ 4/3 × πr^{3} = πr2h

⇒ 4/3 × r = h

⇒ h = 4/3 × r

⇒ h = 4/3 × (2.1)

⇒ h = 2.8 cm