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Get access to the detailed solutions to the previous years questions asked in IIFT exam
Part of the work completed on Monday, Tuesday and Wednesday = 1/9 +1/12 + 1/15 = 47/180
Part of the work completed at the end of 9 days of work = 47(3)/180 = 47/60
remaining part of the work= 13/60 = 39/180
Part of the work completed by ram on 10th day = 1/9 = 20 /180
Part of the work completed by Rvi on 11th day = 1/12 = 15/180
remaining part of the work = 4/180
Ratan can do 12//180th of work on 12th day. Hence he needs 1/3rd of the 12th day.
Proportion of the completed work done by Ravi = 3(1/12) + 15/180 = 1/3