Solution to question asked by “psreddy.bank@gmail.com”.

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6M + 5W = 1/6     …..(i)
3M + 4W = 1/10   …..(ii)
On 2eq(ii) – eq(i)
3W = 1/5 – 1/6
W = 1/90
Putting the value of W in eq(i)
6M + 1/18 = 1/6
M = 1/54
Now,
9M + 15W = 9/54 + 15/90
1/6 + 1/6 = 1/3;
Hence, 9 men and 15 women can do the same piece of work in 3 days, as their combined efficiency is 1/3 work per day.

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