+130071 From his line of sight....we have that
tan (20) = height of street lamp from his line of sight / distance from streetlamp
tan (20) = height of streetlamp from his line of sight / 25 ..... multiply both sides by 25
25* tan (20) = height of streetlamp from his line of sight
So......the total height of the streetlamp =
6 + 25 * tan(20) ≈ 15 ft
