# 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

Answered by Renu Varma | 01 Sep, 2021, 12:36: PM

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