The sum of the present ages of a father ...

The sum of the present ages of a father and his son is 78 years. After five years, the ratio of their ages becomes 7 : 4. What is the present age (in years) of the father?
पिता तथा पुत्र की वर्तमान आयु का योग 78 वर्ष है | पांच वर्षों के बाद, उनकी उम्र का अनुपात 7 : 4 होगा | पिता की वर्तमान उम्र ( वर्ष में ) कितनी है ?

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