If 15 men or 24 women or 36 boys can do a piece of work in 12 days, working 8 hours a day, how many men must be associated with 12 women and 6 boys to do another piece of work 2$1 \over 4$ times as great in 30 days working 6 hours a day ?



[ A ]    4
[ B ]    8 right
[ C ]    6
[ D ]    10
[ E ]    12
Answer : Option B
Explanation :
500
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