A and b working separately can do a piece of work in 9 and 12 days respectively. if they work a day alternatively. a beginning in how many dqys the work will be competed?
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A can do a work= 9 days
B can do a work= 12 days
L.C.M of 9 and 12 is 36
so 2days can do 7 work
therefore in 10 days can do 35 work
remaining 1 work can be done by A i.e 1/4
so work will complete in 41/4 days.
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