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