Rohit while seeing a bird on tree top made 45° angle of elevation. He walks 240ft. towards the tree to observe the bird closely, thus making 60° angle of elevation. How far was Rohit from the tree initially?

• A. $\frac{{240\sqrt 3 }}{{\sqrt 3- 1}}\,{\text{ft}}$$
• B. $\frac{{240}}{{\sqrt 3- 1}}\,{\text{ft}}$$
• C. $\frac{{240}}{{\sqrt 3 }}\,{\text{ft}}$$
• D. $240\sqrt 3 \,{\text{ft}}$$