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The Hernandez family and the Griffin family each used their sprinklers last summer. The water output rate for the Hernandez family's
sprinkler was 25 L per hour. The water output rate for the Griffin family's sprinkler was 35 L per hour. The families used their sprinklers
for a combined total of 65 hours, resulting in a total water output of 2025 L. How long was each sprinkler used?

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