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?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 6
Let the total work be 36 units
Efficiancy of(A + B) = 4 - 1 = 3
Time taken by (A + B) to complete 50% work = 18/3 = 6 days