12 farmers harvest crops in the field in20hours. How many farmers will be required to do the same work in 15 hours?

Dear student,let  the number of farmers needed to harvest the crop in 15 hrs = x
It is given that 12 farmers are needed to harvest the field in 20 hrs.Clearly number of farmers varies inversely with the time taken.
So, 15 × x = 20 × 12
x = (20 × 12)/15 = 240/15 = 16
So, 16 farmers are needed to harvest the crop in 15 hrs.

Regards 

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