Question

Akansha is 15 years old and today his birthday, and his brother age is 17years old, tell me akansha kitne saal baad 19 seal like jogi aur she is 19 so what brother's age??​

Answer 1

Answer:

So the brother age is 21.

Let the age of Hari be 5x and Harry be 7x.

4 years later,

Age of Hari = 5x + 4

Age of Harry = 7x + 4

According to the question,

$\frac{5 x+4}{7 x+4}=\frac{3}{4}$

⇒ 4(5x + 4) = 3(7x + 4)

⇒ 20x + 16 = 21x + 12

⇒ 21x - 20x = 16 - 12

⇒ x = 4

Hari age = 5x = 5×4 = 20 years

Harry age = 7x = 7×4 = 28 years

Answer 2

Answer:

So the brother age is 21.

Let the age of Hari be 5x and Harry be 7x.

4 years later,

Age of Hari = 5x + 4

Age of Harry = 7x + 4

According to the question,

\frac{5 x+4}{7 x+4}=\frac{3}{4}7x+45x+4=43

⇒ 4(5x + 4) = 3(7x + 4)

⇒ 20x + 16 = 21x + 12

⇒ 21x - 20x = 16 - 12

⇒ x = 4

Hari age = 5x = 5×4 = 20 years

Harry age = 7x = 7×4 = 28 years

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