Question

A watering can contained 5 1/2 quarts water. After all the plants were watered, only 4 cups remained.

How many cups of water were used to water the plants?


7 cups

18 cups

40 cups

84 cups

Answer 1

18 cups, their is 22 cups in 5 1/2 quarts so 22-4 is 18

Answer 2

18 cups

Explanation:

Because there is 4 cups in a quart, we can turn 5 1/2 or 5.5 quarts into 22 cups:

5 1/2 or 5.5

( 5 x 4) + (0.5 x 4) = 22

Since we need to find how many cups were used, that is x. Because 22 cups is the total amount of cups and 4 is the amount remaining then the equation would look like this:

x + 4 = 22

Finally you solve to get:

x = 18 cups