Mathematics, 08.07.2020 21:01, LanBon02

Han and Clare are stuffing envelopes. Han can stuff 20 envelopes in one minute, and Clare can stuff 10 envelopes in one minute. They start working together on a pile of 1,000 envelopes. How long does it take them to finish the pile?

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Han and Clare are stuffing envelopes. Han can stuff 20 envelopes in one minute, and Clare can stuff...