Question

Radius of the base of a right circular cylinder is 14dm and height is 15m .

Find the __
i) Curved surface area of the cylinder

ii) Total surface of the cylinder

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Answer 1

Given

• Radius of the base of right circular Cylinder = 14dm = 14/10 = 1.4m
• Height of cylinder = 15m

To find

• Curved surface area of Cylinder
• Total surface area of the cylinder

Solution

As we know that

→ Curved surface area of cylinder

→ 2πrh

→ 2 × 22/7 × 1.4 × 15

→ 132m²

Now, total surface area of cylinder

→ 2πr(r + h)

→ 2 × 22/7 × 1.4(1.4 + 15)

→ 2 × 22 × 0.2 × 16.4

→ 144.32m²

Hence,

• Curved surface area of Cylinder = 132m²
• Total surface area of Cylinder = 144.32m²