A can do a piece of work in 12 days. When he had worked for 2 days b joins him. If they complete work was finished in 8 days. In how many days b alone can finish the work?
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number of days taken by A to do the work =12 days
number of days A had work for =2
It means that after 10 days would have completed the work.
after B joint A had taken 8 days
number of days taken by B=10-8
=2 days
it means that B can finish a work in 2 days which A can finish in 10 days
so the ratio of work is 10:2
=5:1
=5
number of days B will take to finish the work =5×12
= 60
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