Question

the ratio of ages of the father and mother was 11:10 when their son was born . the ratio of ages of the father and mother will be 19:18 when the son will be twice his present age . what is the ratio pf present ages of father and mother?

Answer 1

Answer:

Required ratio is: $\frac{15}{14}$

Step-by-step explanation:

We have been given the ratio of ages of the father and mother was 11:10 when their son was born

And the ratio of ages of the father and mother will be 19:18 when the son will be twice his present age

Let the present age of son be x

Then the twice age will be 2x

According to question:

$\frac{11+2x}{10+2x}=\frac{19}{18}$

$18(11+2x)=19(10+2x)$

$198+36x=190+38x$

$8=2x$

$x=4$

Ratio of present ages will be: $\frac{11+x}{10+x}=\frac{11+4}{10+4}$

Required ratio is: $\frac{15}{14}$

Answer 2

Answer:

15:14

Step-by-step explanation

anyone can solve it by using long and time taking method but here i m going to tell u a trick

ratio of age  11:10 (on time of birth of son)

 ratio             19:18 (when son is twice)

 

now consider this as a simple question of average

    father age 11+19=30/2= 15

  mother age 10+18= 28/2 = 14

so the answer is 15:14