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If $s$ denotes the length of an arc of a circle of radius $r$ subtended by a central angle $\theta$, find the missing quantity
$$s=?$$
$$r=40\text{ cm}$$
$$\theta =135°$$

A

$91.1062 \text{ m}$

B

$91.1062 \text{ cm}$

C

$94.2478 \text{ m}$

D

$94.2478 \text{ cm}$

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