एक व्यक्ति की आयु अपने बेटे से चार गुनी है। बीस वर्ष बाद उसकी आयु अपने बेटे से केवल दुगुनी होगी। उनकी वर्तमान आयु बताइए A man is four time as old as his son. Twenty years later he will be just twice as old as his son. Find their present ages

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एक व्यक्ति की आयु अपने बेटे से चार गुनी है। बीस वर्ष बाद उसकी आयु अपने बेटे से केवल दुगुनी होगी। उनकी वर्तमान आयु बताइए A man is four time as old as his son. Twenty years later he will be just twice as old as his son. Find their present ages