Subject
Bank Exam
Topic
Dutch-Bangla Bank Ltd. - PO (IBA, DU) (15.11.2019) - 2019
The side length of a square inscribed in a circle is 2. What is the area of circle ?
The side length of a square inscribed in a circle is 2. What is the area of circle ?
ক)
πখ)
√2 πগ)
2πঘ)
2√2 πঙ)
π2Explanation
প্রশ্নে বলা হচ্ছে, বৃত্তে অর্ন্তলিখিত একটি বর্গের একবাহুর দৈর্ঘ্য 2 একক হলে বৃত্তের ক্ষেত্রফল কত ? প্রশ্নানুসারে প্রথমে চিত্র আঁকুনঃ এখানে ত্রিভুজ ABC একটি সমকোণী ত্রিভুজ । ∴পিথাগোরাসের সূত্র অনুসারে, AB 2 + AD 2 = BD 2 => 2 2 + 2 2 = BD 2 => BD 2 = 8 ∴ BD = 2√2 ∴ বৃত্তের ক্ষেত্রফল = πr 2 = π ( 2√2/2 ) 2 = 2πRelated questions
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