alleryব্যাসার্ধের একটি বৃত্তাকার সেক্টর 21 cm এর পরিধি রয়েছে 86 cm। এর এলাকা খুঁজুন; π = 22/7 ব্যবহার করুন।
A462 cm²
B231 cm²
C693 cm²
D924 cm²
Answer & Solution
Correct answer: A. 462 cm²
চাপ হল 86−2×21 = 44 সেমি, কোণ দিচ্ছে 44/132×360° =120°;
এলাকা হল 120/360×(22/7)×21² =462 cm²।
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