alleryএকটি ঘর 10 m দীর্ঘ, 8 m প্রশস্ত এবং 3 m উঁচু। এর চার দেওয়ালের মোট ক্ষেত্রফল কত?
A240 m²
B108 m²
C216 m²
D144 m²
Answer & Solution
Correct answer: B. 108 m²
চার দেওয়ালের ক্ষেত্রফল হলো 2(l + b)h = 2 x 18 x 3 = 108 square metres।
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