alleryIn a circle of radius $r$, an arc of length $l$ subtends at the centre an angle (in radians) of:
A$l + r$
B$\dfrac{r}{l}$
C$\dfrac{l}{r}$
D$lr$
Answer & Solution
Correct answer: C. $\dfrac{l}{r}$
From l = rθ, the angle θ = l/r radians.
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