At present, the ratio of the ages of Maya and Chhaya is 6 : 5 and fifteen years from now, the ratio will get changed to 9 : 8. Maya's present age is?

Let the present ages of Maya and Chhaya are 6N and 5N yr. respectively.
According to the question, After 15 yr,
(6N + 15) / (5N + 15) = 9/8
⇒ 48N + 120 = 45N + 135
⇒ N = 5
Hence, present age of Maya = 5 x 6 = 30 yr