A can do a piece of work in 10 days and B can do the same work in 12 days. How long will they take to finish the work if they work together?
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Answer:
a car do work in 10 days
A can do work in 1day=1/10 days
B can do work=12 days
B can do work in 1 day=1/12days
In how many days work together=
1/10+1/12
6+5/60
11/60
work done by a and b=60/11=5.45
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