নিচের ছবিতে ভারসাম্য রক্ষার জন্য কত ওজনের প্রয়োজন?
A. ৪ কেজি
B. ৬ কেজি
C. ৯ কেজি
D. ২ কেজি
সঠিক উত্তরঃ
B.
৬ কেজি
Explanation:
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