When a plane mirror is placed horizontally on level ground at a distance of 40 m from foot of a building the top of building and

Question

When a plane mirror is placed horizontally on level ground at a distance of 40 m from foot of a building the top of building and its image in the mirror subtends an angle of 90 at the eyes The height of building is 20 m 40 m 60 m 45 m 40 m

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