Given the figure of an AA battery.
As shown, an AA battery has the shape of a cylinder.
The surface area of the cylinder will be calculated using the following formula:
[tex]SA=2\pi(r^2+rh)[/tex]
Where (r) is the radius of the base and (h) is the height.
As shown, the diameter of the base = d = 14 mm
So, the radius = r = d/2 = 7 mm
And h = 49.5 mm
substitute r = 7 and h = 49.5 into the formula of the SA
[tex]SA=2\pi(7^2+7*49.5)=2\pi *395.5\approx2485[/tex]
So, the answer will be B. 2,485 mm²
