question_answer

The shadow of a tower standing on a level ground is found to be 40 m longer when Sun's altitude is \[30{}^\circ \] than when it was \[60{}^\circ \]. What is the height of the tower?

A)  \[15\,\sqrt{2}\,m\]                     

B)  \[20\,\sqrt{2}\,m\]

C)  \[22\,\sqrt{2}\,m\]                     

D)  \[18\,\sqrt{2}\,m\]

E)  None of these