question_answer

What is the angle of elevation of a light source when the length of the shadow of a flag post is equal to its height?

A) \[\text{45}{}^\circ \]      

B)        \[\text{3}0{}^\circ \] 

C) \[\text{6}0{}^\circ \]      

D)        (d)\[\text{9}0{}^\circ \]