alleryএকটি বৃত্তকলার কোণ 90° এবং ব্যাসার্ধ 14 cm। pi = 22/7 ধরে, এর ক্ষেত্রফল কত?
A124 sq cm
B154 sq cm
C77 sq cm
D308 sq cm
Answer & Solution
Correct answer: B. 154 sq cm
সম্পূর্ণ বৃত্তের ক্ষেত্রফল 616 -এর এক-চতুর্থাংশ হলো 154 square centimetres।
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