Solve the following
Mona's father is thrice as old as mona. After 12 years he will be just twice his daughter. find their present ages.
Let us assume that the present age of Mona is X years, then his fathers age will be 3X years.
So the equation we get from the problem:
2(X + 12) = (3X + 12)
2X + 24 = 3X + 12
2X - 3X = 12 - 24
- X = - 12
X = 12 years.
Then Mona's present age is 12 years and her father's present age is 3 x 12 = 36 years.
Ans: 36 12 years.
let mona's father's age be x years and her age be y years.
now, from question,
x = 3y
and after 12 years, his age will be x + 12
and his daughter's age will be y + 12
so after 12 years,
x+12 = 2(y+12) = x + 12 = 2y + 24 = x = 2y + 12
so we have 2 eq.s,
x=3y .................... (1)
and x = 2y + 12 ........................ (2)
therefore, sub. value of x from (1) in (2), we get,
3y = 2y + 12
= y = 12 years.
therefore, x = 3y = 36 years.
hence, mona is 12 years old and her father is 36 years old.
hope it helps~!
we can consider that the present age of mona is x years.
Then her father's age will be thrice of it.
Then father's age will be 3x
Age of mona after 12 years = 12 + x years
ans: 12 years
age of her father :
ans: 36 years
Therefore the age of mona is 12 yearsand her father's age is 36 years