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Mathematics, 01.12.2021 02:20 mbragg2005

The Phillips family and the Griffin family each used their sprinklers last summer. The water output rate for the Phillips family's sprinkler was 25L per hour. The water output rate for the Griffin family's sprinkler was 15L per hour. The families used their sprinklers for a combined total of 55 hours, resulting in a total water output of 975L. How long was each sprinkler used

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