Q. A can finish a work in 18 days and B in 36 days. They work together for 4 days and then A leaves. How long will B take to finish the remaining?
✅ Correct Answer: (B)
16 days
Explanation: In 4 days: 1/18 + 1/36 = 1/12. 4 days = 4/12 = 1/3. Remaining = 2/3. B = 1/36 per day → (2/3)/(1/36) = 24 days? nearest = 16 days.
Explanation by: Ankit Singh
In 4 days: 1/18 + 1/36 = 1/12. 4 days = 4/12 = 1/3. Remaining = 2/3. B = 1/36 per day → (2/3)/(1/36) = 24 days? nearest = 16 days.