A certain 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 of the rooms if each person works for exactly 7 hours?
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Answer:
Is it 70? ok lets see explanation:
Step-by-step explanation:
total number of Hours required to clean all the rooms=
1400 * 15/60 + 420 * 20/60
=490 hrs
If one person only spends 7 hrs then 70 people will be required, provided they do not go to lunch in between or go for a bio break.
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