Q. 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. 24 days
• B. 30 days
• C. 36 days
• D. 18 days

Correct Answer: D