A and B can finish a piece of work in 18 days and 27 days respectively. Together they start the work but after few days B left the job. After how many days had B left the job if A finished the remaining work in 3 days?
Answer & explanation
Correct answer: option 2
Total work = efficiency × number of days
Work done by A in 3 days = 3 × 3 = 9
Remaining work = 54 - 9 = 45
Total efficiency of A and B = 2 + 3 = 5
Time taken when A & B worked together = \(\frac{45}{5}\) = 9 days
Hence, B left the work after 9 days