Mathematics
Level
pending
A wire when bent in the form of a square, encloses an area of 121 square centimetre. The same wire is bent in the form of a circle. Find the area of the circle.
The answer is 154.
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1 solution
Area of the square = 121 sq cm -> Side of the square = Sq. Root of 121 = 11 cm -> Perimeter = 4a = 44cm. therefore, circumference of the circle = 2 x pi x r = 44 therefore, r = 7 cm. Area = pi x r x r = 154 sq.cm