Question 70

A, B and C can together do a job in 9 days. C alone can do the job in 36 days. In how many days can A and B do 50% of the job working together?

Solution

A,B and C together can do in 1 day (1/9) part of the job .

So, A and B can do in 1 day (1/9-1/36)=(1/12) part of the job.

So, they together can do 50% of the job in (12/2)= 6 days.

A is correct choice.

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