Aryan's age is 3/7th age of his father. After 4 years, he will be 1/3th the age of his father. How old is the father at present?

40

56

46

48

Let the father's age be x years. Aryan's present age=(3/7)x (2/7)x+4=1/3(x+4),6x+84=7x+28,x=56

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