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Mathematics, 03.12.2019 23:31 kaylaciamp65

Acertain hotel has 1,400 single rooms and 420 double rooms. each room is cleaned by one person. if one person can clean a single room every 15 minutes and a double room every 20 minutes, how many cleaning persons are needed to clean all the rooms if each person works for exactly 7 hours?

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Acertain hotel has 1,400 single rooms and 420 double rooms. each room is cleaned by one person. if o...
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