By Trigonometrical Ratios,
[tex]\begin{gathered} \sin 21^o=\frac{1200}{x} \\ Cross\text{ multiplying, we get} \\ x\sin 21=1200 \\ \text{Dividing both sides by }\sin 21\text{ , we get} \\ x=\frac{1200}{\sin 21}=\frac{1200}{0.35837} \\ x=3348.514\approx3348.5\text{ meters} \end{gathered}[/tex]
Thus, the correct answer is x = 3,348.5 meters ( last option)
