question_answer

A bridge across a river makes an angle of \[45{}^\circ \] with the river bank. If the length of the bridge across the river is 160 m, what is the width of the river?

A)  \[30\,\sqrt{3}\,\,m\]                   

B)  \[90\,\sqrt{3}\]

C)  \[80\,\sqrt{2}\,\,m\]       

D)  \[60\,\sqrt{3}\,\,m\]

E)  None of these