Question

a grandfather is nine times older than his grandson. he is also 72 years older than his grandson. find their present ages.​

Answer 1

Step-by-step explanation:

let be grand son is x

nd grandfather be y

grandfather is 72 yrs. older than his grand son

so, y=9x

72=9x ( because y=72)

x = 8

then age of grandson is 8 yrs.

nd age of grandfather is 80 yrs.

Answer 2

Answer:

Present age of grandson = 9 years

Present age of grandfather = 81 years

Step-by-step explanation:

Let,

Present age of grandson = x

Present age of grandfather = 9x

According to question :

➨ x + 72 = 9x

➨ 9x - x = 72

➨ 8x = 72

➨ x = 72 / 8

➨ x = 9

Present age of grandson = 9 years

Present age of grandfather = 9x

➨ 9 (9)

➨ 9 × 9

➨ 81

Verification :

Grandfather is 72 years older than his grandson.

➨ 9 + 72

➨ 81

Therefore,

Present age of grandson = 9 years

Present age of grandfather = 81 years