Question

Find the total surface area of a closed cylindrical tank if its diameter is 6 cm and height is 4 cm​

Answer 1

Answer:

132 cm²

Step-by-step explanation:

Given:

• Diameter = 6 cm  ⇒ Radius = 3 cm
• Height = 4 cm

To find:

Total Surface Area = ?

Solution:

Total Surface area of a cylinder = 2πr (r + h)

⇒ Total Surface area = 2π × 3 (3 + 4)

⇒ Total Surface area = 2 × 22/7 × 3 × 7

⇒ Total Surface Area = (2 × 22 × 3 × 7) ÷ 7

⇒ Total surface area = 22 × 6

⇒ Total surface area = 132 cm²

∴ Total Surface Area of the closed cylindrical tank = 132 cm²