Question : From the peak of a hill 300 m high, the angle of depression of two sides of a bridge lying on the ground are $45°$ and $30°$ (both ends of the bridge are on the same side of the hill). Then the length of the bridge is:

Option 1: $300(\sqrt3 - 1)$ m

Option 2: $300(\sqrt3 + 1)$ m

Option 3: $300\sqrt3$ m

Option 4: $\frac{300}{\sqrt3}$ m