Question

Ankita 's grandfather's age is four times her age.Her grandfather is also 42years older than her.Find the present age of her grandfather

Answer 1

Let the present age of Ankita be x
And her grandfather's age be y

According to question,
y=4x. _______(1)
and,
y-x=42
4x-x=42. (from (1))
3x=42
x=14 then, y=4×14=56
Anita's present age is 14 years
and her grandfather's present age is 56 years

Answer 2

let ankita's age be x
and her grand father age be y
according to problem y=4x
there also given that grand father is 42 years older than her
hence x=y-24
substitute x value in the previous equation
we get y=4(y-24)
y=4y-96
96=4y-y
3y=96
y=32(grand father's age)
y=4x
32=4x
x=32/4
x=8(ankita's age)