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Question
কোনো বৃত্তের ব্যাস 10 cm হলে ক্ষেত্রফল কত?
5
π
10
π
25
π
100
π
ANSWER : 3
Descrption
<p>বৃত্তের ক্ষেত্রফল <math class="wrs_chemistry" xmlns="http://www.w3.org/1998/Math/MathML"><mo>=</mo><mfrac><msup><mi>πD</mi><mn>2</mn></msup><mn>4</mn></mfrac><mo>=</mo><mfrac><mrow><mi mathvariant="normal">π</mi><mo> </mo><mo>×</mo><msup><mn>10</mn><mn>2</mn></msup></mrow><mn>4</mn></mfrac><mo>=</mo><mn>25</mn><mi mathvariant="normal">π</mi></math></p>
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