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avatar+336 

At Joe's Pizza a 16 inch diameter pizza and a 12-inch-diameter pizza cost the same per square inch of top surface area. If the cost of a large pizza is 9.60, what is the cost, in dollars, of the smaller pizza?

 Apr 3, 2020
 #1
avatar+252 
+3

The area of large pizza is 64pi

Area of small is 36pi

ratio- 64:36 or 16:9

9.60/16=0.6

0.6*9=5.4

The small should be $5.40

 

smileyindecisionsmiley

 Apr 3, 2020
 #2
avatar+336 
+1

Thank you! That is clever! 

 Apr 3, 2020
 #3
avatar+111321 
+3

16 in  diameter   =  8 in radius....area =  64 pi

 

12 in diameter  = 6 in radius  .....area =   36 pi

 

So

 

36 pi /  64 pi   =    C  /  9/60

 

36  / 64  =   C  / 9.60

 

9 / 16  = C / 9.60

 

(9/16) (9.60)  = C  = $5.40 = cost of  smaller  pizza

 

 

cool cool cool

 Apr 3, 2020

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