alleryএকটি 30 m বাই 20 m বাগানের চারপাশে একটি অভিন্ন বাইরের পথ 216 m²; এর প্রস্থ?
A3 m
B1 m
C4 m
D2 m
Answer & Solution
Correct answer: D. 2 m
প্রস্থ x এর জন্য, (30 + 2x)(20 + 2x) − 600 = 216 দেয় (x − 2)(x + 27) = 0, সুতরাং x = 2 মি।
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