A piece of 42 cm long copper wire is bent into the shape of rectangle whose width is half of its length. The dimension of the rectangle is:
Solution
Correct Answer: Option B
ধরা যাক, প্রস্থ x সেমি. দৈরঘ = 2x প্রশ্নমতে , 2(2x+x)=42 or,6x=42 or. X =7 তাহলে , দীর্ঘ 14 প্রস্থ =7
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