1. The sum of two numbers is 33 One number is 2 times as large as the other. What are the numbers?
2. The Scott family and the Roberts family each used their sprinklers last summer. The water output rate for the Scott family's sprinkler was 25 L per hour. The water output rate for the Roberts family's sprinkler was 20 L per hour. The families used their sprinklers for a combined total of 65 hours, resulting in a total water output of 1450 L. How long was each sprinkler used?