Need help with a math problem/riddle? What is the man's age at retirement?

mathhelp32

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A man decides that it was time to retire. He had spent one-twlfth of his life at home when he was a young child and then attended school (public schools, college and grad school) for one-third of his life. After this, he traveled for three years. Then he had his first job for one-thirtieth of his life and his second job for one-tenth of his life. At the latter job, he became CEO for two-fifths more of his life. He was then ready to retire. What was his age at retirement?.

Please explain how you got to the answer!
 
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