1.

A alone can complete a work in 12 data and B alone can do in 15 days. The total work will be completed​

Answer»

Step-by-step explanation:

work DONE in 1 DAY by A=1/12

work done in 1 day by B=1/15

work done by a and b in one day =1/12+1/15

=9/60

So TOTAL work will be completed in 60/9 days



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