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Question
Rahim is 12 years old. He is three times older than Karim. What will be the age of Rahim when he is two times older than Karim?
15 years
16 years
17 years
18 years
ANSWER : 2
Descrption
<pre>If karim's age is x, then Rahim's age will be 3x. According to question , 3x = 12 ∴ x = 4 after y years, Rahim's age will be doubled than Karim. </pre> ∴ 12 + y = 2 (4 + y) <math xmlns = "http://www.w3.org/1998/Math/MathML"><mo>⇒</mo><mi>y</mi><mo> = </mo><mn>4</mn><mo> </mo><mi>a</mi><mi>t</mi><mo> </mo><mi>t</mi><mi>h</mi><mi>e</mi><mo> </mo><mi>t</mi><mi>i</mi><mi>m</mi><mi>e</mi><mo>,</mo><mo> </mo><mi>R</mi><mi>a</mi><mi>h</mi><mi>i</mi><mi>m</mi><mo>'</mo><mi>s</mi><mo> </mo><mi>a</mi><mi>g</mi><mi>e</mi><mo> </mo><mo> = </mo><mo> </mo><mn>3</mn><mi>x</mi><mo> </mo><mo> + </mo><mo> </mo><mi>y</mi><mo> </mo><mo> = </mo><mn>3</mn><mo> × </mo><mn>4</mn><mo> + </mo><mn>4</mn><mo> = </mo><mn>16</mn></math>
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