GKFix MCQ Question

What is the cross-sectional area of a wire with a diameter of 3.0 mm?

• A. 3.14 × 10⁻⁶ m²
• B. 5.0 × 10⁻⁶ m²
• C. 7.065 × 10⁻⁶ m²
• D. 9.0 × 10⁻⁶ m²