Question

sum of age of mother and her daughter 60 year after 15 year mother age will be twice as that of her daughter age at that time find their present age

Answer 1

Dear Student,

Let us assume that the present age of mother be X years and that of daughter will be (60 - X) years.

After 15 years,
​​​​​​Mother's age is X + 15 years
Daughter's age = (60-X) + 15 years

So the equation we get is:

(X + 15) = 2((60 - X) + 15)

X + 15 = 2(75-X)
X + 15 = 150-2X
3X = 135
X = 45 years

Since mother's age is 45 years, then his daughter's age will be (60 - 45) = 15 years

Regards