Answer: 126π units² or about 395.84 units²
Step-by-step explanation:
The surface area of a right cylinder can be found with the following formula. We will substitute the given values and find the surface area. Note that r is equal to the radius and h is equal to the height.
A = 2πrh + 2πr²
Formula:
A = 2πrh + 2πr²
Substitute:
A = 2π(7)(2) + 2π(7)²
Square:
A = 2π(7)(2) + 2π(49)
Multiply:
A = 28π + 98π
or
A ≈ 87.964594 + 307.87608
Add:
A = 126π units²
or
A ≈ 395.84 units²
