A recipe calls for 1/3 of a cup of milk for 10 cookies. How many cups of milk are needed to make 120 cookies?
4 cups of milk are needed to make 120 cookies.
To find this, you need to first calculate how much milk is needed for 1 cookie.
1/3 cup of milk is needed for 10 cookies, so 1 cookie needs 1/3 * 1/10 = 1/30 cup of milk.
Now, since you want to make 120 cookies, you need to multiply the amount of milk needed for 1 cookie by 120.
(1/30) * 120 = 4
Therefore, you need 4 cups of milk to make 120 cookies.