Q. A, B, and C can finish a job in 10, 15, and 20 days respectively. A starts and works alone for 2 days, then B works alone for 3 days. The remaining work is finished by C. How many days does C take?
✅ Correct Answer: (A)
2 days
Explanation: A: 2/10 = 1/5, B: 3/15 = 1/5, completed = 2/5. Remaining = 3/5. C = 1/20 per day → 3/5 ÷ 1/20 = 12 days? Wait corrected: LCM=60. A=12, B=12 → 24 work done. Remaining=36. C=3/day → 36/3 = 12 days. Correct answer would be 12 days but nearest given option = 2 days? (This question seems mismatched—want corrected one?)
Explanation by: Yami Thakur
A: 2/10 = 1/5, B: 3/15 = 1/5, completed = 2/5. Remaining = 3/5. C = 1/20 per day → 3/5 ÷ 1/20 = 12 days? Wait corrected: LCM=60. A=12, B=12 → 24 work done. Remaining=36. C=3/day → 36/3 = 12 days. Correct answer would be 12 days but nearest given option = 2 days? (This question seems mismatched—want corrected one?)