Question

after 5 years the average age of 2 sisters becomes 25.now the ratio of their age is 3:5. wt is the present age of younger sister.​

Answer 1

Explanation:

let the age of younger sister is x and elder is y

so average age will be (x+5+ y+5)/2 = 25

x+y=40

now ratio of their present age is x/y=3/5

so 5x/3=y

as x+y = 40

x+5x/3= 40

x=15years

y=25years

Answer 2

The answer is 25years old

Explanation step by step:

let the age of the younger sister is x and the elder is y

so average age will (x+5+ y+5)/2 = 25

x+y=40

so now the ratio of their present age is x/y=3/5

so 5x/3=y

as x+y = 40

x+5x/3= 40

x=15years

y=25years

the present age of the younger sister is.​ 25years old