Question

Find the surface area of the cone to the nearest square unit. Use π = 3.14.

Answer 1

Answer:

339.12 cm²

Explanation:

surface area of cone: πr² + πrl

where "r" is radius, "l" is slant height

Here given:

• radius: 6 cm

• slant height: 12 cm

Solve for surface area:

• πr² + πrl

• (3.14)(6)² + (3.14)(6)(12)

• 113.04 + 226.08

• 339.12 cm²

Answer 2

• radius=r=6cm
• l=12cm

So

TSA

• πr(r+l)
• π(6)(6+12)
• 6π(18)
• 108π
• 339.12cm²