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একটি বর্গক্ষেত্রের ক্ষেত্রফল নির্ণয় করুন যার বাহুর দৈর্ঘ্য $7$ cm।

A$28$ cm²
B$42$ cm²
C$49$ cm²
D$56$ cm²
Answer & Solution
Correct answer: C. $49$ cm²
বর্গক্ষেত্রের ক্ষেত্রফল $= \text{side}^2 = 7^2 = 49$ cm²।
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