Question

A and B together can complete a work in 12 days a alone can complete it in 20 days B now days the work for half a day daily then in how many days in a and b together will complete the work

Answer 1

12 days ur question contains the answer

Answer 2

now work done by a and b together in 1 day 1/12x ( let total work be x)
then work done by a alone in one day = 1/20x
so, by b= 1/12- 1/20
=1/30
now b do half work
which mean work done per day by b = 1/60
then work done per day by a and b together = 1/20+ 1/60 =1/15
so days req. by them to complete woke work is 15