Salim can do a piece of work in 20 days whereas his friend Akram can do it little faster & both of them finish it in 7.5 days. In how many days will Akram do it alone?
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Salim can do a piece of work in 20 days whereas his friend Akram can do it little faster & both of them finish it in 7.5 days. In how many days will Akram do it alone?