Sarthaks Test
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1 Answer

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Let total work be W

Work done by 1 man in 1 month = 10∗7W​=70W​

Work done by 1 woman in 1 month = 20∗7W​=140W​

Work done by 1 child in 1 month = 40∗7W​=280W​

Total work done by 5 men, 5 women and 5 children in 1 month= 705W​+1405W​+2805W​=8W​

Let number of months be n


by (1.7k points)
The complete question is "It 10 men or 20 women or 40 children can do a piece of work in 7 months, then 5 men, 5 women and 5 children together can do half of the work in :"

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