Two rooms

A woman cleans the room in 30 minutes, and a man in 90 minutes. How long will it take them clean two rooms?

Correct answer:

t =  45 min

Step-by-step explanation:


t/30+t/90 = 2

4t = 180


t = 180/4 = 45

t = 45

Our simple equation calculator calculates it.



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