Correct Answer: Option B
ধরা যাক , দৈর্ঘ্য= x প্রস্থ = 2x-10
প্রস্নমতে ,
x(2x-10)= 600
2x2-10x-600 = 0 or, 2x2-30x+20x - 600=0 or,2x(x-30)+20(x-30)=0 or, (2x+20)(x-30)=0 or,x=30 দৈর্ঘ্য= 30
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