Q. A can complete a work in 15 days and B in 20 days. They work together for 4 days after which B leaves. The remaining work will be completed by A in:
✅ Correct Answer: (B)
8 days
Explanation: Completed in 4 days = 4 × (7/60) = 7/15. Remaining = 8/15. A finishes in (8/15) × 15 = 8 days.
Explanation by: Deepak Sahoo
Completed in 4 days = 4 × (7/60) = 7/15. Remaining = 8/15. A finishes in (8/15) × 15 = 8 days.