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 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?

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 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?

A).

20

B).

22 ½

C). 25 

D).

 30


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1 answers

0 vote
Answered by on | Votes 0 |

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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