The Nguyen family and the Hernandez family each used their sprinklers last summer. The water output rate for the Nguyen family's sprinkler was 40 L per hour. The water output rate for the Hernandez family's sprinkler was 25 L per hour. The families used their sprinklers for a combined total of 60 hours, resulting in a total water output of 2025 L. How long was each sprinkler used? X S Nguyen family's sprinkler: [] hours Hernandez family's sprinkler: hours