1.

A plane mirror is placed horizontally on level ground at a distance of 60 m from the foot of a tower. The top of the tower and its image in the mirror subtend an angle of 90o at the eye. Calculate the height of the tower.

Answer»

Answer:

Since the TOP of the tower and its image in the MIRROR subtends at the eye makes an angle of 90

o

, the other TWO angles at the beam and mirror interface will be 45

o

each.

Hence we have

tan45

o

=

OY

XY

⟹1=

60

XY

  • ⟹XY=60m


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