প্রশ্ন সংশোধন করুন
প্রশ্ন:
At present , father's age is 4 times more than that of his son . 6 years ago father's age was 10 times more than of his son. What is their present age?
At present , father's age is 4 times more than that of his son . 6 years ago father's age was 10 times more than of his son. What is their present age?