question_answer

A landmark on the bank of a river is observed from two points X and Y on the opposite banks of the river. The lines of sight make equal angles with the bank of the river. If XY = 1 km, what is the width of the river?

A) \[\frac{3}{2}km\]            

B)        \[\frac{1}{2}km\]

C) \[\frac{3\sqrt{2}}{2}km\]             

D)        \[\frac{3\sqrt{3}}{2}km\]