alleryএকটি 20 m বাই 15 m ঘাসের মাঠের বাইরে চারদিকে একটি 2 m চওড়া রাস্তা রয়েছে। রাস্তাটির ক্ষেত্রফল কত?
A140 m²
B136 m²
C156 m²
D176 m²
Answer & Solution
Correct answer: C. 156 m²
বাইরের আয়তক্ষেত্রের ক্ষেত্রফল হলো 24 x 19 = 456 m², যা থেকে মাঠের ক্ষেত্রফল 300 m² বাদ দিলে থাকে 156 m²।
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