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The ratio between the present ages of P and Q is 4 : 5 respectively. Four years hence Q will be five years older than P. What is P’s present age?1). 15 years2). 20 years3). 25 years4). Cannot be determined |
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Answer» <P>The ratio of their ages is 4:5 so let their respective ages be p and Q so we have, p/q = 4/5 ⇒ 5p = 4q ⇒ 5p/4 = q Four years LATER (p + 4) + 5 = q + 4 ⇒ p + 5 = 5p/4 ⇒ p/4 = 5 ⇒ p = 20 |
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