if 160 men take 2 years to construct a building how long will 100 men take to construct the same building ? ( one month = 30 days )
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if 160 men take 2yrs, 100 men would take more time so it is an inverse variation,
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Time taken by160 men =2yrs
time taken by 1 man =160×2
=320yrs
time taken by 100 men =320÷100
= 3.2yrs
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