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    				| 1. | X' can complete a work in 40 days while Y is 20% more effi- cient then 'X' .'Y' worked for 8 days and lift, remaining work is completed by 'Z' in 20 days. Find in how many days 'Z' can ltbegt complete the whole work alone? | 
| Answer» 27 days `=40 xx 5/6 = 33` days (APPROX) Let Z alone can complete work in 't' days. ATQ, `8/33+20/t = 1` `rArr 20/t = 25/33rArr X = (20xx33)/25 = 26` days (approx) | |