Question

A boy is 5 years older than his sister how old r they if their ages r in the ratio 4:3

Answer 1

Let the age of her sister =3x
let the age of boy=4x

as boy is 5 years older then her sister so house age=3x+5. (age of her sister +5 years)

so,age of boy=
4x = 3x +5

5 =4x-3x

x =5

age of sister =3x = 3*5
age of sister= 15 years


age of boy =4x =4*5
age of boy= 20years

Answer 2

Answer:

Age of boy=20 & age of girl=15

Step-by-step explanation:

let the age of her sister =3x

let the age of boy=4x

As boy is 5 years older then her sister so house age=3x+5. (age of her sister +5 years)

So,age of boy=

4x = 3x +5

5 =4x-3x

x =5

Age of sister =3x = 3*5

Age of sister= 15 years

Age of boy =4x =4*5

Age of boy= 20years