Q. A can complete a work in 10 days and B in 15 days. After working together for 4 days, what fraction of the work remains?
✅ Correct Answer: (A)
1/3
Explanation: Combined rate = 1/6. Completed in 4 days = 2/3. Remaining = 1/3.
Explanation by: Deepak Sahoo
Combined rate = 1/6. Completed in 4 days = 2/3. Remaining = 1/3.