sir this is the important question from the book -ML aggarwal( avichal publication) class 10th , chapter20 , heights and distances
A vertical pole and a vertical tower are on the same level ground.
From the top of the pole the angle of elevation of the top of the tower is 60
and the angle of depression of the foot of the tower is 30.
Find the height of the tower if the height of the pole is 20 m.
question no 34 , heights and distances , ICSE board, ML Aggarwal