2017 · Q83
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
Elementary MathematicsMensuration
- A121 cm²
- B144 cm²
- C154 cm²
- D168 cm²
Explanation
Square: side 11 cm ⇒ wire 44 cm. As a circle: 2πr = 44 ⇒ r = 7 cm; area = (22/7)·49 = 154 cm²: option C.