A pilot in an aeroplane at an altitude of 200 m observes two points lying on either side of a river. If the angles of depression of the two points be 45° and 60°, then the width of the river is

A pilot in an aeroplane at an altitude of 200 m observes two points lying on either side of a river. If the angles of depression of the two points be 45° and 60°, then the width of the river is
1). $(200+\frac{200}{\sqrt{3}})m$
2). $(200-\frac{200}{\sqrt{3}})m$
3). $(400\sqrt{3})m$
4). $(\frac{400}{3})m$

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1. A pilot in an aeroplane at an altitude of 200 m observes two points lying on either side of a river. If the angles of depression of the two points be 45° and 60°, then the width of the river is