+0  
 
+1
40
3
avatar

This target has five colors and each color is divided into two parts for scoring zones.

All 9 rings have the same width as the radius of the innermost circle.

What is the ratio of the white area to the yellow area?

 

 Feb 3, 2021

Best Answer 

 #1
avatar+128 
+1

9:1 if im not mistaken

 Feb 3, 2021
 #1
avatar+128 
+1
Best Answer

9:1 if im not mistaken

Elijah Feb 3, 2021
 #2
avatar+116049 
+1

If  we let 1  be  the  radius of the  inner yellow circle,  then  the  yellow area  =  pi (2*1)^2 =  4 pi

 

The  colored area  has  a radius  of  8

 

Its  area  is  pi (8)^2 =    64  pi

 

The    outermost  cirlcle  has a  radius  of 10.....the whole  figure has  an area of (10)^2 pi  = 100 pi

 

So....the  outermost  white  area =   (100  -64) pi =  36pi

 

So  the ratio of the white area to  the yellow area =   36pi/4pi    =   9 : 1

 

Just as Elijah found   !!!!

 

Good  job, Elijah   !!!!

 

cool cool cool

 Feb 3, 2021
 #3
avatar+128 
+1

thanks smiley

Elijah  Feb 3, 2021

21 Online Users

avatar
avatar