Q. A can complete a work in 18 days. With the help of B, he finishes it in 10 days. How long would B alone take?
✅ Correct Answer: (D)
45 days
Explanation: A+B = 1/10, A = 1/18 → B = 1/10 - 1/18 = 1/45.
Explanation by: Kartik Sharma
A+B = 1/10, A = 1/18 → B = 1/10 - 1/18 = 1/45.