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Raman can complete an assignment in 10 days while Sharad can finish the same assignment in 5 days. If they work together on the assignment how much portion of the assignment will be left after a days’ s work? 

Salman and Amir have been assigned to complete an advertisement. Amir started working 2 days after Salman. 5 days after Amir has started working.Salman and Amir to complete the work on their own respectively?