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Mathematics, 20.12.2019 19:31 amp92904

The murphy family and the lewis family each used their sprinklers last summer. the water output rate for the murphy family's sprinkler was 20l per hour. the water output rate for the lewis family's sprinkler was 25l per hour. the families used their sprinklers for a combined total of 75 hours, resulting in a total water output of 1675l. how long was each sprinkler used?

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