Question

6.
A and B working together can do a piece of work in 12 days, while B alone can
finish the work in 30 days. In how many days can A alone finish the work ?
​

Answer 1

A and B finish the work in 12 days

so,A+B=12

and,B finish work alone in 30 days

B=30

then A=B-[A+B]

=30-12

=18

Answer 2

Answer:

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