Answers

2014-09-29T16:09:16+08:00
Construction job = k divided by number of men (k=constant of variation)
let c = construction job,
     n = number of men
     x be the unknown

3 = k/(30) ; k = 90
so, x = 90/50
x = 1.8

50 men takes 1.8 months to do the job..



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