A can do a piece of work in 12 hrs and B in 24 hrs if they both work together in how may days will they finish work?
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Answer:
A 's one day work = 1/12 th
B's one day work = 1/24 th
together they complete 1/12+1/24 = (2+1)/24
= 3/24 = 1/8 th of the work in one day.
reciprocal of one day work will give us the answer
therefore reciprocal of 1/8 = 8
hence together they will take 8 days to complete the work
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