Discussion :: Chain Rule
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24 women or 15 men or 36 boys can finish a piece of work in 12 days, working 8 hours per day, how many men must be associated with 12 women and 6 boys to finish another piece of work
times as greater in 30 days working 6 hours a day?
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Answer : Option B
Explanation :
We have 15 men = 24 women
Or, 12 women = 7.5 men
Also, 36 boys = 15 men
6 boys = 15/6 = 5/2 = 2.5 men
Therefore, 12 women + 6 boys = 7.5 + 2.5 men= 10 men
Now,
The number of day's ratio is 30: 12
The hour's ratio is 6 hours: 8 hours
The work ratio is 1 work: 
Now, we can say that 
Where x is the total number of men
Therefore, the total number of men = 18
So, 18-10 = 8 men must be associated.
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