৭ মিটার ব্যাসার্ধের একটি চাকা ১০ বার ঘুরে কতটুকু দূরত্ব অতিক্রম কর ?
A. ৭০ মিটার
B. ৪৪০ মিটার
C. ২২০ মিটার
D. ১৫৪০ মিটার
সঠিক উত্তরঃ
B.
৪৪০ মিটার
Explanation:

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