Question

A and b can do a work in 12 days and 9 days respectively. If they work on alternate days, a begins the work on which day will the work be completed? 9th day 12th day 11th day 10th day

Answer 1

11th day

1st day 1/12 by A

2nd day 1/9 by B

Total work done in 2 day 1/12 +1/9 = 7/36

In 10 days they will do 7/36 × =35/36

Then 1/36 will left.

So A will complete it in 11th day