Janine needs 280 cups of mushroom soup. If the first team made 90 cups in 60 minutes, and the third team made 70 cups in 90 minutes, how any cups should the second team prepare in order to meet the required amount of soup?
First, 90 + 70 = 160; then, 280 – 160 = 120
The second team needs to prepare 120 cups of soup.