The cost of fencing a circular garden at ₹180/m is ₹6,786. Find the radius of the garden.

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1. **Find length:** Cost per m = ₹180. Total cost = ₹6786. So length $L = \frac{6786}{180} = 37.7$ m.
2. **Use circumference:** $L = 2\pi r$.
3. **Solve for $r$:** $r = \dfrac{L}{2\pi} = \dfrac{37.7}{2\pi} = \dfrac{18.85}{\pi} \approx 6$ m.
4. **Answer:** Radius = 6 m, so option **(a)** is correct.
FINAL_ANSWER: a

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