Question
‘X’ can finish 50% of a job in 8 days. ‘Y’ takes 8 days more than ‘X’ to complete the entire work, and Y is 20% more efficient than ‘Z’. ‘X’ starts the task alone, on 2nd day he is joined by ‘Y’ only, on 3rd day, he is joined by ‘Z’ only, and on 4th day, he again works alone. They follow this same pattern for 9 days. The combined time taken by ‘X’ and ‘Y’ alone to finish the leftover work is how much percent more/less than that by ‘Z’ alone?
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