10 men or 20 women or 70 children can do a piece of work in 7 months. Then 5 men and 5 women and t children can do half of the work in
a. 6 months
b. 4 months
c. 5 months
d. 8 months
Please with explanation. No spamming else I will report.
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how many children say to me then I can give you a correct explanation
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