question_answer

The lower window of a house is at a height of 3 m above the ground and its upper window is 5m vertically above the lower window. At certain instant it is found that the angles of elevation of a balloon from these windows are \[\mathbf{60}{}^\circ \] and \[\mathbf{30}{}^\circ \]respectively. Find the height of the balloon above the ground.

A)  8.5 m                                                              

B)  10.5 m

C)  7.5 m                                                              

D) 8 m

E) None of these