A and b can do a work in 12 days, b and c in 30 days and c and a in 36 days. In how many days will the work be completed, if all three of them work together?
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Let work done by a and b,a+b=12 days
work done by b and c,b+c=30 days
work done by a and c,a+c=36 days
Adding all the three ,we get 2(a+b+c)= 78 days
Work done by all of dem is given by a+b+c=39days
work done by b and c,b+c=30 days
work done by a and c,a+c=36 days
Adding all the three ,we get 2(a+b+c)= 78 days
Work done by all of dem is given by a+b+c=39days
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