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#29421 Bangla Language & Literature অনুপাত সমানুপাত Level 0

কোন ত্রিভুজের তিনটি কোণের অনুপাত ৪ : ৫ : ৯ হলে প্রথম কোণটি কত (ডিগ্রিতে)?

  1. A ১২০
  2. B ৪০
  3. C ৬০
  4. D ৯০
Answer: B - ৪০

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