7. The ages of Hari and Harry are in the ratio 5:7. Four years from now the ratio of their ages will be 3:4. Find their present ages. The denominator of a rational number is greater than its numerator by 8. f the numerator is increased by 17 and the denominator is decreased by 1, the number obtained is Find the rational number.

7. The ages of Hari and Harry are in the ratio 5:7. Four years from no

1.	7. The ages of Hari and Harry are in the ratio 5:7. Four years from now the ratio of their ages will be 3:4. Find their present ages. The denominator of a rational number is greater than its numerator by 8. f the numerator is increased by 17 and the denominator is decreased by 1, the number obtained is Find the rational number.
Answer» Let the rational number be=a/b `b=a+8` `(a+17)/(b-1)=3/2` `2a+34=3b-3` `3(a+8)-2a=37` `3a+24-2a=37` `a=13` `b=a+8=21` `a/b=13/21`.