$A$ $20 \, m$ high electric pole stands upright on the ground with the help of a steel wire attached to its top and fixed on the ground. If the steel wire makes an angle of $60^{\circ}$ with the horizontal ground,find the length of the steel wire (in $m$).
- A$\frac{40}{\sqrt{3}}$
- B$40 \sqrt{3}$
- C$\frac{20}{\sqrt{3}}$
- D$20 \sqrt{3}$
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