Question
Hemant and Irfan can complete a certain piece of work in 9 and 14 days, respectively. They started to work together, and after 3 days, Irfan left. In how many days will Hemant complete the remaining work?
The correct answer is
\(\frac{171}{42} \)
\(W_{left}=1-3(1/9+1/14)=\frac{57}{126};\quad t=9\frac{57}{126}=\frac{171}{42}\text{ days}\)
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