+0  
 
+2
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avatar+394 

im not good at math 

 

A hotel is in the shape of a​ cylinder, with a circular foundation. The circumference of the foundation is

2 times the​ radius, increased by

205.44 ft. Find the radius of the circular foundation. Use 3.14 as an approximation for

piπ.

 

The radius of the foundation is approximately ___ ft, ft2 ft3 

 

 

 

I need a tutor

ladiikeiii  Nov 29, 2017
 #1
avatar+91148 
+2

C  = 2r  +  205.44    (1)  and  C  =  2 * 314 * r     (2)

 

Set (1)  =  (2)   and we have that

 

2r + 205.44  =  2 * 3.14 * r     simplify the right side

 

2r + 205.44  =  6.28r       subtract  2r from each side

 

205.44  =  4.28r       divide both sides by  4.28

 

48  =  r      [ the radius is 48 ft ]

 

 

cool cool cool

CPhill  Nov 29, 2017

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