Question

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)

Answer 1

Answer: 4 bags

Step-by-step explanation:

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

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