Question

A is thrice as good a workman than B. if A takes 60 days to complete a job, how long will it take both of them to finish the work together.

Answer 1

Answer:

22.5 days

Step-by-step explanation:

The efficient ratio of A to B is 3:1.

Therefore the time ratio is 1:3.

The difference in the ratio is 2,

that corresponds to 60 days.

Hence A takes 30 days

            and

B takes 90 days.

If they work together,

they take

30*90/30+90

= 90/4

= 22.5 days.

Answer 2

Answer:

since A takes 60 days to complete a job , B will take 180 days to complete the job.

work done in 1 day by both of them  =

$\frac{1}{60}$ + $\frac{1}{180}$ = $\frac{3 + 1}{180}$

            = $\frac{4}{180}$

             = 1/45

therefore it will take 45 days for them to finish the work together.

Hope this helps!