allery14 cm ব্যাসার্ধের একটি বৃত্ত থেকে 90 degrees কোণের একটি বৃত্তকলা কেটে নেওয়া হলো। এর ক্ষেত্রফল নির্ণয় করুন (pi = 22/7)।
A154 cm²
B77 cm²
C616 cm²
D308 cm²
Answer & Solution
Correct answer: A. 154 cm²
বৃত্তের ক্ষেত্রফলের এক-চতুর্থাংশ হলো (1/4)(22/7)(196) = 154 square centimetres।
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