A copper wire when bent in the form of a square encloses an area of 121 cm2. If the same wire is bent in the form of a circle, it encloses an area equal to? A. 121 cm2 B. 144 cm2 C. 154 cm2 D. 168 cm2 Answer Workspace Report Discuss Answer with explanation Answer: Option C Explanation As is given, area of square = a2 = 121 cm2 So, side of square, a = 11 cm length of the wire = Perimeter of square of side a = 4a = 4*11 = 44cm Let the radius of circle be r cm. Then, Perimeter of circle = Length of wire => 2πr = 44 cm => r = 44/2π = 7 (π = 22/7) Now, Area of circle = πr2 = (22/7) *7*7 = 154 cm2 Workspace
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