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Mathematics, 30.10.2021 19:50 yejinschoi6362

The Morgan family and the Kim family each used their sprinklers last summer. The water output rate for the Morgan family’s sprinkler was 15 L per hour. The water output rate for the Kim family’s sprinkler was 25 L per hour. The families used their sprinklers for a combined total of 70 hours, resulting in a total water output of 1350 L. How long was each sprinkler used?

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