Question

A copper wire is bent in the form of square with an area of 121 cm². If the same wire is bent in the shape of a circle the radius of the circle is ?

• A. 11 cm
• B. 7 cm
• C. 9 cm
• D. 5 cm

Answer 1

Answer:

B. 7 cm

Area of the square= a² = 121 a = 11 Total length of wire = 4a = 44 cm Perimeter of circle = 44 cm 2πr = 44 cm 2 × 22/7 × r = 44 r = 44 × 7/(22 × 2) = 7 cm