Question

kajal is 5 years younger than her brother . after 4 years, their ages will be in ratio 2:3 find thier present ages​

Answer 1

let kajal e x

then brother is x+5

after 4 years,their ages will be in ratio 2:3,

→ Her brother's present age = (x + 5) years

→ (x + 4)/ (x + 9) = 2/3

→ 3x + 12 = 2x + 18

→ x = 6 ...

brother present age =x + 5) years = 6 + 5 = 11 years

Answer 2

Answer:

Kajal's age=10years

brother's age=15years

Explanation:

let kajal's age be x and her brother age be y

By given condition

y=x+5---------(1)

their ages 4 year's ago

kajal's age=x-4

brothers age=y-4

By given 2nd condition

x-4/y-4=2/3

x/y=2/3

3x=2y

3x/2=y-----------(2)

from (1) and (2)

3x/2=x+5

3x=2(x+5)

3x=2x+10

3x-2x=10

x=10

from (1)

y=x+5

y=10+5

y=15

therefore,

kajal's age=10years

brother's age=15years