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A copper wire is bent in the form of square with an area of 121 cm². If the same wire is bent in the form of a circle, the radius (in cm) of the circle is (Take π = 22/7)
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- 7
- 10
- 11
- 14
- 7
Correct Option: A
Using Rule 10,
Side of square = √121 = 11 cm
&there4 Length of wire = 4 × 11 = 44 cm
∴ 2πr = 44
| ⇒ 2 × | × r = 44 | |
| 7 |
| ⇒ r = | = 7 cm. | |
| 2 × 22 |
