question_answer

A circular wire of radius 1 dm is cut and is placed along the circumference of a circle of radius of one metre. The angle subtended by the wire at the centre of the circle is equal to

A)  \[\frac{\pi }{4}\] radian                

B)  \[\frac{\pi }{3}\] radian

C)  \[\frac{\pi }{5}\] radian              

D)         \[\frac{\pi }{10}\]radian