Susan makes 5 fruit cups for the picnic. In each cup, she has 5 strawberries and 3 kiwi. Joanna uses the same number of total fruits to make her stawberry and kiwi fruit cups, but she makes 4 cups. In each cup, she uses 8 strawberries. How many kiwis are in each furit cup Joanna makes?

The answer to this question is that Joanna used 2 kiwis in each fruit cup. We can work this out in the following way:

5 x 5 = 25

8 x 4 = 32

3 x 5 = 15

40 - 32 = 8

15+25 = 40

Susan makes 5 fruit cups

each fruit cup has 5 strawberries and 3 kiwis

so the number of strawberries used is - 5 x 5 = 25 strawberries

and the number of kiwis used - 5 x 3 = 15 kiwis

so the total number of fruits - 25 + 15 = 40 fruits

Joanna uses 40 fruits to make 4 fruit cups

each cup she uses 8 strawberries

therefore total number of strawberries she uses - 8x 4 = 32 strawberries

she has 40 fruits in total and 32 of those are strawberries

the rest are kiwis

number of kiwis = 40 - 32 = 8

8 kiwis are there and she has to make 4 cups

so for each cup number of kiwis = 8 / 4 = 2

so each cup has 2 kiwis