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A recipe calls for 2 cups of flour to make a cake that feeds 8 people. You are having a party for 60 people and therefore need more flour. You go to the store and find that they only have one kind of flour which is sold in bags of 32 ounces. So how many bags of flour do you need to buy? (note that 1 cup is 8 ounces)

 May 20, 2021
 #1
avatar+121056 
+1

2 cups  =  16 ounces

 

So  using a proportion

 

16 / 8   =  x  /  60          where  x  is the number of ounces we need to buy

 

cross-multiply

 

16 * 60   =  8 * x

 

960   = 8 x

 

960 / 8   = x  =   120    ounces

 

The  number of  bags  we  need   =    ceiling  [ 120/32 ]    = 4 bags

 

cool cool cool

 May 20, 2021

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