Anil & billu working separately can do a piece of work in 9 & 12 days resp. if they work for a day alternately with anil beginning it, in how many days, the work will be completed?
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Let us assume that the amount of work to be done is X.
Work done by Anil in one day is X/9
Work done by Billu in one day is X/12
The work done on day 1 is X/9
on second day is X/12
third is X/9
Fourth is X/12 and so on.
The amount of work done in 2 days is X/9 + X/12 = 7X/36
Thus 36/7 i.e. 5.1 iterations or approx 6 iterations which means 6*2 = 12 days to complete the work
Work done by Anil in one day is X/9
Work done by Billu in one day is X/12
The work done on day 1 is X/9
on second day is X/12
third is X/9
Fourth is X/12 and so on.
The amount of work done in 2 days is X/9 + X/12 = 7X/36
Thus 36/7 i.e. 5.1 iterations or approx 6 iterations which means 6*2 = 12 days to complete the work
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