Question

mother is 25 years older than asmii

Answer 1

Let the age of ashmi be X
Then age of mother be x+25

After 15yrs
age of ashmi=2 (15+x)
age of mother=X+30
according to question
2(15+x)=x+30.
Solve this equation you all get your answer .

Answer 2

Let the age  of Asmi be x years

Age of  her mother  = x + 25 years

After 15 years

Age  of mother = x + 25 + 15 = x + 40 years

Age of Asmi = x + 15 = years

Now,

According to question,

Age  of  mother = 2 × age  of asmi

x + 40 = 2(x + 15)

x + 40 = 2x + 30

x = 10    

Hence,

Age  of Asmi = 10 years

Age of mother = 10 + 25 =  35 years