alleryমিনিটের কাঁটা 90° কোণ অতিক্রম করে। কতটা সময় অতিক্রান্ত হয়েছে?
A30 min
B10 min
C15 min
D20 min
Answer & Solution
Correct answer: C. 15 min
প্রতি মিনিটে 6° হারে, 90° অতিক্রম করতে 15 মিনিট সময় লাগে।
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