Question

Find the total surface area of a closed cylindrical drum if it's diameter is 30cm and height is 45 cm. (3.14)
Please explain answer​

Answer 1

★ Given :

• A closed cylindrical drum if it's diameter is 30cm and height is 45 cm. Take π = 3.14

★ To find :

• Total Surface Area.

★ Solution :

• In the question Diameter is given so firstly we find the Radius.

• Then, by using the formula of Total surface area of Cylinderal Drum we get the required Surface area.

✰ Diameter = 30cm

✰ Radius = 30/2 = 15cm

✰ Height = 45cm

Total surface area = 2πr (h + r)

➤ 2 × 3.14 × 15 (45 + 15)

➤ 94.2 (45 + 15)

➤ 94.2 × 60

➤ 5652 cm²

∴ Total surface area is 5652 cm²

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