The ratio of the age of a man and his son is 5: 1. After 10 years, their ages will be in the ratio 3: 1. What is the father's present age? एक व्यक्ति और उसके पुत्र की वर्तमान आयु में अनुपात 5: 1 है | 10 वर्ष बाद, उनकी आयु में अनुपात 3: 1 हो जाएगा | पिता की वर्तमान आयु क्या है ?

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