Question

Product of the ages of Virat 7 years ago and 7 years later is 480. Find his present age.

Answer 1

it is answer p lease understand from there

Answer 2

Let the present age of Virat be x years

His age 7 years ago = x - 7 years

His age 7 years later = x + 7 years

According to the given condition, (x - 7) (x + 7) = 480

⇒ $x^{2}$ +7x - 7x - 49 = 480

⇒ $x^{2}$ - 49 = 480

⇒ $x^{2}$ = 480 + 49

⇒ $x^{2}$ = 529

⇒ x =$\sqrt{529}$

⇒ x = 23

Hence the present age of Virat is 23 years.