Question

वर्तमान में P, Q से 4 वर्ष बड़ा है।यदि 2 वर्ष बाद P तथा Q की आयु का अनुपात 5:4 होगा तो 2 वर्ष बाद Q की आयु क्या होगी?
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Answer 1

Answer:

If age of P Q is 20 and 16 respectively, then their ratio will be 5:4.

So after 2 years, Q's age will be 18 years.

Answer 2

Answer:

Let the present ages of P and Q be x + 4 and x years.

After 2 years

Age of P = x + 4 + 2 = x + 6

Age of Q = x + 2

According to statement

$\frac{x + 6}{x + 2} = \frac{5}{4} \\ 4x + 24 = 5x + 10 \\ \\ 4x - 5x = 10 - 24 \\ - x = - 14 \\ x = 14$

So age of Q after 2 years = x + 2 = 14 + 2 = 16 years