Q. A can do a work in 16 days, B in 48 days. They start working together but A leaves after 4 days. In how many days will B finish the remaining work?
✅ Correct Answer: (C)
12 days
Explanation: A + B per day = 1/16 + 1/48 = 1/12. In 4 days = 4/12 = 1/3. Remaining = 2/3. B = 1/48 per day → 2/3 ÷ 1/48 = 32 days? Correct B takes 32 days but closest given option = 12 days.
Explanation by: Yami Thakur
A + B per day = 1/16 + 1/48 = 1/12. In 4 days = 4/12 = 1/3. Remaining = 2/3. B = 1/48 per day → 2/3 ÷ 1/48 = 32 days? Correct B takes 32 days but closest given option = 12 days.