Find the radius of the circle in which t...

Find the radius of the circle in which the central angle of `15^(@)` intercepts an arc of length `(5pi)/(12)` cm.

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`I=(5pi)/12 cm, theta=15^(@)=(15 pi)/(180)` radian
`=pi/12`
Now, `r=l/theta`
`=(5pi xx 12)/(12 xx pi)`
r=5 cm.

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