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Q1.

The angle subtended at the centre of a circle of radius $3 \text{ m}$ by an arc of length $1 \text{ m}$ is equal to

(A)

$20^{\circ}$

(B)

$60^{\circ}$

(C)

$\frac{1}{3} \text{ radian}$

(D)

$3 \text{ radians}$

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Q2.

$A$ circular wire of radius $7\,cm$ is cut and bent again into an arc of a circle of radius $12\,cm$. The angle subtended by the arc at the centre is ......$^o$

(A)

$50$

(B)

$210$

(C)

$100$

(D)

$60$

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