A can do a job in 12 days and B in 24 days. They work together for 2 days, and then A leaves. In how many more days will B finish the job?

💡 Solution & Explanation

Together they do 1/12 + 1/24 = 1/8 of the job per day, so in 2 days they finish 1/4 of it. The part left is 3/4 of the job. B alone does 1/24 of the job per day, so B needs 3/4 × 24 = 18 more days.