Roshani saw an eagle on the top of a tree at an angle of elevation of `61^(@)`, while she was standing at the door of her house. She went on the terrace of the house so that she could see it clearly. The terrace was at a height of `4m`. While observing the eagle from there the angle of elevation was `52^(@)`. At what height from the ground was the eagle? `tan 61^(@)=1.8, tan 52^(@)=1.28, tann 29^(@)=0.55, tan 38^(@)=0.78)`
