Question

Which of the following formulas would find the surface area of a right cylinder
where h is the height, ris the radius, and BA is the base area?
Check all that apply.
A. 2 pi r^2 + 2 pi rh
B. Ba + 2 pi rh
c. Ba + pi r^2
D. Pi r^2 + pi rh
E.2 pi r^2

Answer 1

Answer:

A and B

Step-by-step explanation:

The surface area is $2\pi rh+2\pi r^2$

BA is also the base, which is $\pi r^2$

That means that B is also an answer.

Answer 2

The formulas which can be use to find the surface area of a right cylinder is  2πr² + 2 πrh and BA+2πrh.

What is surface area of cylinder?

Surface area of cylinder is the area of each faces by which it is enclosed.

The surface area of cylinder can be calculated with the following formula;

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

Here, (h) is the height of the cylinder and (r) is the radius.

This formula is similar to the option A. Thus, the option A is correct. The base of the cylinder is circular and there are two circle at the base of a cylinder.

The base area of the cylinder is,

$BA=2(\pi r^2)\\BA=2\pi r^2$

Put this value in the surface area formula of cylinder as,

$A=BA+2\pi rh$

Thus, the option B is also correct.

Hence, the formulas which can be use to find the surface area of a right cylinder is  2πr² + 2 πrh and BA+2πrh.

Learn more about the surface area of cylinder here:

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