Question

A and B can do a piece of work in 45 days and 40 days respectively. They began
to do the work together but A leaves after some days and then B completed the
remaining work n 23 days. The number of days after which A left the work was
1. 9
2. 11
3. 12
4. 15
5. 16

Answer 1

answer will be .1.) 9

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