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Question
If a square mirror has a 20-inch diagonal, what is the approxirnate perimeter of the mirror, in inhes?
47
51
57
60
ANSWER : 2
Descrption
<pre>বর্গাকার দর্পণটির ডায়াগোনাল বা কর্ণ d = 20 ইঞ্চি " " " বাহুর দৈর্ঘ্য a = <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>20</mn><msqrt><mn>2</mn></msqrt></mfrac><mo> = </mo><mn>10</mn><msqrt><mn>2</mn></msqrt></math> ইঞ্চি আবার, বর্গের পেরিমিটার বা পরিসীমা = 4a = <math xmlns = "http://www.w3.org/1998/Math/MathML"><mn>4</mn><mo>×</mo><mn>10</mn><msqrt><mn>2</mn></msqrt></math> = 56.67 ইঞ্চি = 56.57 ইঞ্চি সুতরাং সর্বচ্চ পরিসীমা হবে, 57 ইঞ্চি = 57 ইঞ্চি </pre>
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