An aircraft executes a horizontal loop at a speed of \(720\) km/h with its wings banked at \(15^{\circ}\). What is the radius of the loop? (Take \(g=10~\text{m/s}^{2}\), \(\tan 15^{\circ}=0.27\))
1. \(1.30\) km
2. \(14.9\) km
3. \(1.55\) km
4. \(20.9\) km