Question

my question is. The left one 6 and 5

Answer 1

The work done by A in one day 1/6
The work done by B in one day 1/4
Together work done by A and B in one day 1/6+1/4 equals to 5/12
work done by A in 2 days equals to 1/3
Left work 1-1/3 equals to 2/3
5/12 is done in 1 day
1 is done in 12/5 day
2/3 is done in 12/5*2/3 equals to 4/5 days plus 2 days