Leon is at the lake with his friends. It costs $8.50 to rent a paddleboat for a 1/2-hour ride. Together, Leon and his friends have $25.50. How long can they ride in a paddleboat if they spend all of their money?

If 30 minutes costs $8.50, then we divide $25.50 by $8.50 getting 3.

Thus, Leon and his friends can ride a total of 1.5 hours or 90 minutes.