Dear Student,
Let the present age of seema = x years
∴ present age of seema's mother = 3x years
After 5 years, age of seema = (x + 5) years
After 5 years, age of seema's mother = 3x + 5 years
According to the given condition,
3x+ 5 + x+ 5 = 78
⇒ 4x = 68
⇒ x = 17 years
Hence the present age of seema and her mother is 17 and 51 years respectively.
Regards.