Business, 29.08.2019 21:30, maxi12312345
He kelly family and the stewart family each used their sprinklers last summer. the water output rate for the kelly family's sprinkler was 20l per hour. the water output rate for the stewart family's sprinkler was 40l per hour. the families used their sprinklers for a combined total of 65 hours, resulting in a total water output of 2100l . how long was each sprinkler used?
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He kelly family and the stewart family each used their sprinklers last summer. the water output rate...
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