A and b working separately can do a work in 9 days and 12 days respectively. a start the work and they work on alternate days. in how many days will the work be completed
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A can do part of work in 1 day =1/9
B =1/12
Part of work done in two days=1/9+1/12
=7/36
This will continue till 35/36 part of work will be done in 10 days
Part of day in which 1/36 part of work will be completed
1/4 day
So total days =10+1/4=41/4 days
B =1/12
Part of work done in two days=1/9+1/12
=7/36
This will continue till 35/36 part of work will be done in 10 days
Part of day in which 1/36 part of work will be completed
1/4 day
So total days =10+1/4=41/4 days
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