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Mathematics, 07.12.2021 22:00 kanga06

The Aoki family and the Hill family each used their sprinklers last summer. The water output rate for the Aoki family's sprinkler was 30 L per hour. The water output rate for the Hill family's sprinkler was 20 L per hour. The families used their sprinklers for
a combined total of 40 hours, resulting in a total water output of 950 L. How long was each sprinkler used?

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The Aoki family and the Hill family each used their sprinklers last summer. The water output rate fo...

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