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Question
একটি আয়তকার ঘরের দৈর্ঘ্য প্রস্থের দেড়গুণ,এর ক্ষেত্রফল 384 বর্গমিটার হলে পরিসীমা কত ?
70 মিটার
80 মিটার
90 মিটার
96 মিটার
ANSWER : 2
Descrption
<pre> ধরি, প্রস্থ x মি. দৈর্ঘ্য x x 1<math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>1</mn><mn>2</mn></mfrac><mo> </mo><mspace linebreak = "newline"/><mo>⇒</mo><mfrac><mrow><mn>3</mn><mi>x</mi></mrow><mn>2</mn></mfrac><mspace linebreak = "newline"/><mo>.</mo><mo>'</mo><mo>.</mo><mo> </mo><msup><mi>x</mi><mn>2</mn></msup><mo> </mo><mo> = </mo><mfrac><mrow><mn>384</mn><mo>×</mo><mn>2</mn></mrow><mn>3</mn></mfrac><mspace linebreak = "newline"/><mo>⇒</mo><msup><mi>x</mi><mn>2</mn></msup><mo> = </mo><mn>256</mn><mspace linebreak = "newline"/><mo>.</mo><mo>'</mo><mo>.</mo><mi>x</mi><mo> = </mo><mn>16</mn></math> ∴ পরিসীমা = <math xmlns = "http://www.w3.org/1998/Math/MathML"><mn>2</mn><mo>(</mo><mn>16</mn><mo> + </mo><mfrac><mrow><mn>3</mn><mo>×</mo><mn>16</mn></mrow><mn>2</mn></mfrac><mo>)</mo></math> মি. = 80 মি. </pre>
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