7 men and 3 boys working together can do four times as much as work as a man and a boy. What is the ratio of working capacities of a man and a boy?

• ক 5 : 2
• খ 0.12638888888889 ✅ সঠিক উত্তর
• গ 2 : 1
• ঘ 4 : 3