1.

A is thrice good a workman as B and therefore is able to finish a job in 60 days less than B. Working together they can do it in?

Answer»

22 ½



Ratio of TIMES by A and B= 1:3
difference of time is 2 days B takes 3 days if DIFF of time is 60 days B takes 3/2 *60 =90 days
A’s 1day work is=1/30
B’s 1 day work =1/90
(A+B )’s ONE day



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