Final answer:
To make 10 quarts of each type of lemonade, they would need approximately 3.33 quarts of lemon juice for each type.
Step-by-step explanation:
To find out how many quarts of lemon juice they need, we need to determine the ratio of lemon juice to sugar water solution in the lemonade recipe. Let's assume the recipe calls for mixing 1 quart of lemon juice with 3 quarts of sugar water solution for the lemonade. So for 10 quarts of lemonade, they would need 10/3 quarts of lemon juice. Therefore, they would need approximately 3.33 quarts of lemon juice for each type of lemonade.