Question

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

Answer 1

the answer is A

Explanation:

the formula is 2π rh +2πr^2

you put the values in

2π (6*15) +2π(6)^2

then you solve

180π+ 72π= 252π

Answer 2

For this case we have that by definition, the surface area of a cylinder is given by:

`SA = 2 \pi * r * h + 2 \pi * r ^ 2`

Where:

A: It's the radio

h: It is the height of the cylinder

We have to:

`r = 6 \ units\\h = 15 \ units`

Substituting:

`SA = 2 \pi * 6 * 15 + 2 \pi * (6) ^ 2\\SA = 2 \pi * 6 * 15 + 2 \pi * (6) ^ 2\\SA = 180 \pi + 72 \pi\\SA = 252 \pi \ units ^ 2`

Answer:

Option A