The age of a man 10 years ago was thrice the age of his son. 10 years hence, the man's age will be twice the age of his son. The ratio of their present ages is = ?

• ক 5 : 2
• খ 7 : 3 ✅ সঠিক উত্তর
• গ 9 : 2
• ঘ 13 : 4