The capacity of a closed cylindrical vessel of height 1m is 15.4 litres. How many square metres of metal sheet would be needed to make it?

Given: ⇒ h = 1m, V = 15.4l = 0.0154 m³ ⇒ Let radius = r ⇒ V = πr²h ⇒ 0.0154 = πr²h = (22/7) × r² × 1 ⇒ r = 0.07m ⇒ Total Surface Area = 2πr² + 2πrh ⇒ 2 × (22/7) × 0.07 (0.07 + 1) ⇒ 0.44 × 1.07 m² ⇒ 0.4708 m²