3 years ago

Help I forgot how to do this.

Mathematics

1 answer:

mote1985 [20]3 years ago

4 0

Answer:

it's answer is B.

Hope it will help :)

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Find the surface area of the cylinder in terms of pi.

Ilia_Sergeevich [38]

Hello!

To find the surface area of a cylinder you use the equation

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

SA is surface area
r is radius
h is height

Put in the values you know

$SA = 2 \pi 9 * 3 + 2 \pi 9^{2}$

Square the number

$SA = 2 \pi 9 * 3 + 2 \pi 81$

Times the 9 and 3

$SA = 2 \pi 27 + 2 \pi 81$

Multiply the 2 and 27

$SA = 54 \pi + 2 \pi 81$

Multiply the 2 and 81

$SA = 54 \pi + 162 \pi$

Add

$SA = 216 \pi$

The answer is $216 \pi$

Hope this helps!

8 0

3 years ago

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Aleks [24]

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4 years ago

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ankoles [38]

Answer:

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