Question

4. A and b can do a piece of work in 30 days , while b and c can do the same work in 24 days and c and a in 20 days . They all work together for 10 days when b and c leave. How many days more will a take to finish the work? A. 18 days b. 24 days c. 30 days d. 36 days

Answer 1

24 days will be right answer...