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What is the surface area of a right cylinder which has a base with radius 9 units and has a height of 12 units?

A) 508.7 units squared

B) 678.2 units squared

C) 1,186.9 units squared

D) 1,256.0 units squared

pwolfey  Oct 31, 2017
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SA  = 

 

2pi *r * h  +  2 pi * r^2  =

 

2pi * r  * [ h + r ]  =

 

2 * 3.14 *  9  * [ 12 + 9 ]  =  1186.9 units^2

 

 

cool cool cool

CPhill  Oct 31, 2017

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