The Hughes family and the Sanders famlly each used their sprinklers last summer. The Hughes family's sprinkler was used for 20 hours. The Sanders family's sprinkler was used for 30 hours. There was a combined total output of 1500 L of water, What was the water output rate for each sprinkler if the sum of the two rates was 55 L per hour? Hughes family's sprinkler: Sanders family's sprinkler: