Question

Arvind is 8 years older than his sister. In 3 years,he will be twice as old as his sister.How old are they now ?

Answer 1

Arvind is 16 and his sister is 8 years old

Answer 2

Answer:

Let   the present age of sister be x,

and age of arvind= x+8

After 3 years,

age of sister=x+3

Age of Arvind=x+8+3=x+11

According to the Question,

x+11=2(x+3)

x+11=2x+6

2x-x=11-6

x=5

therefore present age,

of sister=5 years

of Arvind=5+8=13