ব্যাংক মডেল টেস্ট [সাপ্তাহিক]১টি পরীক্ষায় এসেছেপ্রশ্ন ৫২Today is Ratul's 12th birthday and his father's 40th birthday. How many years form today will Ratul's father be twice as old as Ratul's at that time?ক16 yearsখ21 yearsগ20 yearsঘ14 yearsউত্তর দেখুন