Question

When a plane mirror is placed horizontally on level ground at a distance of 60m from the foot of tower,
the top of the tower and its image in the mirror subtend an angle of 90° at the eye. The height of the tower
[ ]
a) 30 m
b) 60 m
c) 90 m
d) 120 m​

Answer 1

Answer:

Hope it is helpful to you....

Explanation:

when a plane mirror is placed horizontally on a level ground at a distance of 60m from the top of tower as shown in figure. a/c to question, The top of tower and its image in the mirror subtend an angle of 90° at the eyes. so, angle made by top of tower and horizontal line is 45° as shown in figure.