A and B together complete a work in 12 days. A alone in 18 days. How long does B alone take?
- 20 days
- 24 days
- 30 days
- 36 days
Show answer and solution
Correct answer: D. 36 days
1. A+B per day: 1/12. A per day: 1/18. So B per day: 1/12 − 1/18 = 3/36 − 2/36 = 1/36.
2. B alone takes 36 days.
_Source: TSICET 2024 PYQ Q.83 (Shift 1, Time and Work)_