Question

Which of the following is the surface area of the right cylinder below?

Answer 1

Answer: OPTION C

Step-by-step explanation:

You need to use this formula for calculate the surface area of the right cylinder:

$SA=2\pi r^2+2\pi rh$

Where "r" is the radius and "h" is the height.

You can identify in the figure that:

$r=6units\\h=14units$

Knowing this, you can substitute these values into the formula $SA=2\pi r^2+2\pi rh$, therefore you get that the surface area of this right cylinder is:

$SA=2\pi (6units)^2+2\pi (6units)(14units)$

$SA=240\pi\ units^2$

Answer 2

Answer is C

A=2πrh+2πr^2

A=2π*6*14+2π*(6)^2

A=π*(2*6*14+2*6^2)= 240 π