self Maths Puzzle

Q. Harish is thrice as good a workman as Manish and therefore able to finish a piece of work in 60 days less than Manish. Find time in which they can do it together.

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self Other Question

Q. The work done by (x-1) men in (x+1) days and the work done by (x+1) men in (x+2) days are in ratio 5:6. Find x? Q. Sreeji can stich a suit in 3hrs less time than premji. Sreeji stiches it alone for 4 hrs and then premji takes over and. Completes it. If altogether 14 hrs were required to stich the suit, how many hours would premji take a stich the same alone?