Question
If one man or two women or four boys or five girls can
finish a work in 39 days, then how many days will one man, one woman, one boy and one girl together take to finish the same work.Solution
1M =2W=4B=5G=39 Men,WomenBoysGirls 3978156195 780-LCM 201054-Efficiency Work of (M+W+B+G) =780/39=20days
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History books are never together.
