sir this is the important question from the book -ML aggarwal( avichal publication) class 10th , chapter20 , heights and distances
it is given that From the top of a building 20 m high,
the angle of elevation of the top of a monument is 45 and the angle of depression of its foot is 15. Find the height of the monument.
question no 35 , heights and distances , ICSE board, ML Aggarwal