$6 \text{ cm}$ त्रिज्या वाले वृत्त के केंद्र पर $18^{\circ}$ का कोण अंतरित करने वाले चाप की लंबाई ($\text{cm}$ में) क्या है?

  • A
    $\frac{\pi}{5}$
  • B
    $\frac{2\pi}{5}$
  • C
    $\frac{3\pi}{5}$
  • D
    इनमें से कोई नहीं

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