The average age of sons and their father is 20 years. If the age of sons is 10 years, find the age of their father.

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Solution

Total age of father and son $= 20 \times 2 = 40$ yr
Age of son $= 10$ years
Age of father $= 40 - 10 = 30$ years

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The average age of sons and their father is 20 years. If the age of sons is 10 years, find the age of their father.

Total age of father and son =20×2=40 yr Age of son =10 yearsAge of father =40−10=30 years

Total age of father and son $= 20 \times 2 = 40$ yr
Age of son $= 10$ years
Age of father $= 40 - 10 = 30$ years