Quincy was stuck inside during an afternoon rainstorm. He spent 20 minutes reading, 18 minutes eating lunch, 12 minutes playing cards, and 10 minutes drawing. For every 10 minutes Quincy was inside he spent 3 minutes ________.

, adding the times of all the activities tells us when she was stuck inside for 1 hour there are 6 ten-minute periods in an hour. 3mins each * 6 of these periods give 18 minutes, the amount of time he was eating lunch