Q. A can complete a work in 20 days and B can complete it in 30 days. How long will they take to complete the work together?
✅ Correct Answer: (B)
12 days
Explanation: Combined work in 1 day = 1/20 + 1/30 = 5/60 = 1/12. Hence, they take 12 days.
Explanation by: Krishna Sharma
Combined work in 1 day = 1/20 + 1/30 = 5/60 = 1/12. Hence, they take 12 days.