Q. A is twice as efficient as B and B is three times as efficient as C. If C alone can complete a work in 72 days, then A and B together will complete it in:
✅ Correct Answer: (B)
8 days
Explanation: Efficiency ratio A:B:C = 6:3:1. Total = 9 units. C takes 72 days, so 1 unit = 1/72 work/day. A+B = 9/72 = 1/8 work/day. Time = 8 days.
Explanation by: Deepak Sahoo
Efficiency ratio A:B:C = 6:3:1. Total = 9 units. C takes 72 days, so 1 unit = 1/72 work/day. A+B = 9/72 = 1/8 work/day. Time = 8 days.