13 The angle of elevation of the top of a tower 30 m high from the foot of another tower in the same plane is 60 and the angle of elevation of the top of second tower from the foot of first tower is 30 Find the distance between the two towers and also the height of the other tower Sol Two vertical tower TW 30 m and ER x m let are standing on a horizontal plane RW y let The angle of elevation from R to top 90 m high tower is 60 and the angle of elevation of second tower from W is 30 E xm R 60 30 ym 30 m W