Question
Jaya and Hema can clean an apartment in 30 days. Hema
and Sushma can do the same task in 40 days, while Jaya and Sushma take 60 days to do it. How many days will it take all three of them to work together to clean the apartment?Solution
Total Efficiency of Jaya Hema and Sushma – 2(Jaya +Hema +Sushma) =4+3+2=9 (Jaya +Hema +Sushma) =9/2=4.5 And now together to clean the apartment=120/4.5 =1200/45=80/3 = 26(2/3) days.
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