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CBSE Class 8 Answered

If 3 men or 4 women can do a piece of work in 43 days how long will 7 men and 5 women take to complete the same work ?
Asked by ekanshbisht107 | 31 Aug, 2021, 10:23: AM
Expert Answer
Let x and y be the efficiencies of 1 man and 1 woman respectively.
Therefore, 3x = 4y
i.e. x : y = 4 : 3
Total workdone = 4 x 3 x 43
Total efficiency of 7 men and 5 women = 7 x 4 + 5 x 3 = 43
They can complete the work in = (4 x 3 x 43)/43 = 12 days
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