A began a business with Rs. 85,000. He was joined afterwards by B with Rs. 42,500. For how much period does B join, if the profits at the end of the year are divided in the ratio of 3 : 1?

• ক 6 months
• খ 8 months ✅ সঠিক উত্তর
• গ 5 months
• ঘ 4 months