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Earlier discussion
1 older comment kept for context.
Timothy Godspower
If 50men buid it in 60 days
How many more men is needed or should be added to the 50 men to finish same work in 40 days.
Xmen = 40 days
First we find the total men that can do the work in 40 days
Xmen x 40 days = 50men × 60 days
Xmen = 75
Now subtracting 50 men from 75 men will give the total that was added to the 50 men to finish the work in 40 day's
75-50= 25 men
Hence 25 men was added.