Answer:
835.7 in.²
Explanation:
surface area of cylinder = 2B + Ch,
where B = area of one base (a cylinder has 2 circular bases)
C = circumference of the base
h = height of the cylinder
B = πr²
B = π × (7 in.)²
B = π × 49 in.²
B = 49π in.²
h = 12 in.
C = 2πr
C = 2 × π × 7 in.
C = 14π in.
SA = 2B + Ch
SA = 2 × 49π in.² + 14π × 12 in.²
SA = 98π in.² + 168π in.²
SA = 266π in.²
Use the π button of the calculator, not 3.14 for π.
SA = 266 × 3.141592654 in.²
SA = 835.6636459 in.²
Answer: 835.7 in.²