Question

mona's father is thrice as old as Mona after 12 years his age will be twice that of his daughter find their present age​

Answer 1

Answer:

let the age of mona be x

so, father age = y

By the problem  

(I) 3x =y      (Present)

(II) 2(x+12) =  y+12     (After 12 yrs)

so from the above two equation we can get

x=12 and y=36

Answer 2

Step-by-step explanation:

now:

Mona ---- x

Dad ----- 3x

in 12 years:

Mona = x+12

Dad = 3x+12

3x+12 = 2(x+12)

take over

Mona age be 12 & her father's age be 36

Mona's age is 12. Her father's age is 36. After 12 years her father's age will be 48. Mona's age will be 24.

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