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OpenStudy (homeworksucks):
Jane works twice as fast as her daughter Anna. If it takes 15 minutes to clean the kitchen together, how long would it take Anna to clean the kitchen by herself?
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OpenStudy (anonymous):
J=2A rates work/(A + 2A) = 15 min work/ (3A) = 15 min work/(1A) = 45 min.
OpenStudy (homeworksucks):
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