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A and B working separately can do a piece of work in 9 and 12 days respectively. If they work for a day alternately with A beginning, the work would be completed in
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Explanation:
A’s one day work = 4 units
B’s one day work = 3 units
Since they work on alternate day they will do 7 units in 2 days. This 2 days cycle will continue
Now,
T.W\ units/cycle=36\7=5 cycle
1 cycle – 2 days
5 cycle – 10 days
Now A’s turn. He will do
36−35=1 units of work and
he will take =14 days
work completed in =10+1\4=10 1\4 days