Question

What is the approximate surface area of the cylinder 3mm 16mm (use 3.14 for π)

A. 301.44mm^2
B. 357. 96mm^2
C. 339.12mm^2
D. 370.52mm^2

Answer 1

The formula of a Surface Area of a cylinder:

`S.A.=2\pi r^2+2\pi rH`

r - radius

H - heihgt

We have r = 3mm and H = 16mm. Substitute:

`S.A.=2\pi(3)^2+2\pi(3)(16)=2\pi(9)+2\pi(48)=18\pi+96\pi=114\pi\ mm^2\\\\\pi\approx3.14\to S.A.\approx114\cdot3.14=357.96\ mm^2`

Answer: B. 357.96 mm^2