Question

What is the total surface area of the cylinder shown below?

• A. $440m^2$
• B. $660m^2$
• C. $748m^2$
• D. $868m^2$

Answer 1

The correct option is C $748m^2$

Total surface area of a cylinder = Lateral/Curved Surface + Area of circular faces = $2\pi rh+\pi r^2$
In the above figure:
Radius, $r=7m$
Height, $h=10m$
On substituting the values in the fourmula, we get:
Total surface area of cylinder $=2\times \frac{22}{7}\times 7\times 10+2\times \frac{22}{7}\times 7^2=440+308=748m^2$