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A can do a piece of work in 18 days and ...

A can do a piece of work in 18 days and B in 12 days. They began the work together, but B left the work 3 days before its completion. In how many days, in all, was the work completed ?

A

12

B

10

C

9.6

D

9

Text Solution

Verified by Experts

The correct Answer is:
D
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