Question

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

Answer 1

Part A:
Surface area = 3.14(2*3 + 2²)

Part B: 
Surface area = 3.14(2*3 + 2²)
                      = 3.14(6 + 4)
                      = 3.14 * 10
                      = 31.4 units²

Answer 2

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