Suneel’s age after six years will be three-seventh of his father’s age. Ten years ago, the ratio of their ages was 1 : 5. What is Suneel father’s age at present ?

\par Let the ages of Suneel and his father 10 years ago be x and 5x years respectively.

\par Suneel's age after 6 years = (x + 10) + 6 = (x + 16) years

\par Father's age after 6 years = (5x + 10) + 6 = (5x + 16) years

(x + 16) = \frac{3}{7}(5x + 16)

7(x + 16) = 3(5x + 16)

7x + 112 = 15x + 48

8x = 64

x = 8

\par Hence, Suneel father's present age = (5x + 10) = 50 years.