Cillian and Dorian are 15 miles apart on a bike path when they start biking toward each other. Cillian rides at a constant speed of 3 miles per hour, and Dorian rides at a constant speed of 2 miles per hour. How long does it take until they meet? Use a table, double number line, tape diagram or another strategy to show your thinking. (Please answer quickly this is due in 15 minutes and im being timed)​