Question

7. A and B can do a piece of work in 45 days and 40 days respectively. They began tr do the work together but A leaves after some days and then B completed the remaining work a 23 days. The number of days after which A left the work was: (a) 6 (b) 8 (c) 9 (d) 12 (e) None of these​

Answer 1

Step-by-step explanation:

The correct answer is 9 days.

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