Question

age of vinit is twice of his sister affter 4year the product of the ages= 160

Answer 1

here is your answer by UDIT

let current Age of vinit and his sister be x and y respectively

then according to question

his sister's age after 4 years=y+4

and it is also given that

x+4=2(y+4).............1

and

x×y=160..............2

substituting value of x from 1 in 2

then we get

(2y+4)y=160

y^2+2y=160/2

y^2+2y=80

(y-8)(y+10)

neglecting negative value of y we get y=8

and x=2y+4

so x =20


thanks