allery12-র দাগ থেকে ঘড়ির কাঁটার ঘূর্ণনের অভিমুখে পরিমাপ করলে, 7:00 টায় ঘণ্টার কাঁটা কোথায় থাকে?
A150°
B210°
C240°
D180°
Answer & Solution
Correct answer: B. 210°
প্রতি ঘণ্টায় 30° হারে সাত ঘণ্টা ঘণ্টার কাঁটাকে 210°-তে স্থাপন করে।
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