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

surface area = 3.14(rs + r2)

part a: if r = 2 units and s = 3 units, write an expression that can be used to calculate the surface area of the cone.

part b: what is the surface area of the cone? show your work

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