Question

I want to know that the two men can do a piece of work in 6 hours and 4 hours respectively after the work has worked for 2 hours he join bataen by when should work be completed
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Answer 1

Answer:

a one hour work = 1/6

b one hour work =1/4

suppose

after 2 hour b left the work so a will complete the work in

1/4-1/6=1/12

now a comlete the work =1/4 +1/12 =4/12 is answer or 1/3