Question
Pawan and Qureshi can complete a task in 12 days, while Pawan and Rishi can finish the same task in 40/3 days. Initially, Pawan and Rishi begin working together. After 4 days, Qureshi joins them. All three work together for the next 6 days, after which Qureshi and Rishi leave the job. The remaining work is finished by Pawan alone in 1 day.Determine the time required for Qureshi, working alone, to complete the entire task.
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