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The present ages of a mother and her ...

The present ages of a mother and her son are I the ratio 11:5. When the son becomes a sold as his mother is now, then the ratio of his fathers age to that of his mother is 19:17. When the son becomes as old as his father is now, then the sum of his fathers age and his age will be 170 years. What is the fathers present age? `52\ y e a r s` b. `60\ y e a r s` c. `65\ y e a r s` d. `70\ y e a r s`

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