What will be the curved surface area of cone whose height is 8 cm and

1.	What will be the curved surface area of cone whose height is 8 cm and radius is 6 cm?1. 1530/7 square cm2. 1320/7 square cm3. 1120/7 square cm4. 1100/7 square cm
Answer» Correct Answer - Option 2 : 1320/7 square cm Given: The height and radius of cone is 8 cm and 6 cm respectively Formula used: Curved surface area of cone = π r l Slant height = √ (h)² + (r)² Where r is radius, h is height and l is the slant height of cone Calculation: To calculate the curved surface area first we have to calculate the slant height ∴ Slant height = √ (8)² + (6)² = √100 = 10 cm Now, curved surface area of cone = π r l = (22/7) × 6 × 10 = 1320/7 square cm Hence, option (2) is correct

What will be the curved surface area of cone whose height is 8 cm and radius is 6 cm?1. 1530/7 square cm2. 1320/7 square cm3. 1120/7 square cm4. 1100/7 square cm

Answer» Correct Answer - Option 2 : 1320/7 square cm

Given:

The height and radius of cone is 8 cm and 6 cm respectively

Formula used:

Curved surface area of cone = π r l

Slant height = √ (h)² + (r)²

Where r is radius, h is height and l is the slant height of cone

Calculation:

To calculate the curved surface area first we have to calculate the slant height

∴ Slant height = √ (8)² + (6)² = √100 = 10 cm

Now, curved surface area of cone = π r l = (22/7) × 6 × 10 = 1320/7 square cm

Hence, option (2) is correct

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