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Mathematics, 18.02.2021 17:30 wafflewarriormg
It usually takes Mary 6 hours to do the cleaning that Jane can do in 5 hours and Ellen can do in 4 hours. If
Jane and Ellen agree to help Mary so that they can all go on a picnic, how long will it take them to do the
cleaning?
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Answers: 1
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It usually takes Mary 6 hours to do the cleaning that Jane can do in 5 hours and Ellen can do in 4 h...
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