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zubka84 [21]
4 years ago
9

The surface area of a cone with radius r units and slant height s units is shown below:

Mathematics
2 answers:
KonstantinChe [14]4 years ago
4 0
<span>Part A:
</span>Surface area = 3.14(2*3 + 2²<span>)

</span><span>Part B: 
</span>Surface area = 3.14(2*3 + 2²)
                      = 3.14(6 + 4)
                      = 3.14 * 10
                      = 31.4 units²
Feliz [49]4 years ago
4 0

Answer:

A. Surface Area = 3.14 × (2 × 3 + 2²)

B. Surface Area = 31.4 (unit)²

Step-by-step explanation:

A. The expression used for calculate the surface area of the cone is:

Surface Area = 3.14 × (r×s + r²)

If r = 2 and s = 3

then, Surface Area = 3.14 × (2 × 3 + 2²)

B. Surface Area = 3.14 × (2 × 3 + 2²)

⇒ Surface Area = 3.14 × (6 + 4)

⇒ Surface Area = 3.14 × (10)

⇒ Surface Area = 31.4 (unit)²

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