A boy saw the top of a building under construction at an elevation of `30^circ`.
The completed building was 12m higher and the boy saw its top, at an
elevation of `60^circ` from the same spot.
a) Draw a rough figure based on the given details.
b) What is the height of the building?
c) What is the distance between the building and the boy?

A '1.5' metre tall boy saw the top. of a building under construction at an elevation of 30^circ .The completed building was 10 metres higher and the boy sáw its top at an elevation of 60^circ from the same spot. What is the height of the büilding?

A boy standing on the top of a tower 20 metrés height, saw the top of a building at an elevation of 50^circ and its base at a depression of 30^circ a) Draw a rough figure. according to the given data. b) find the distance between the tower and the building. c) find the distance from the top of the tower to the base of the building. d) find the height of the building. [sin 50^circ =0.77, cos 50^circ =0.64, tan 50^circ =1.2, 'sqrt3 =1.7]

A man, standing at the foot of a tower, sees the top of a building 20 metres away at an elevation of 60^o . Climbing to the top of the tower, he sees it at an elevation of 45^o .Draw a rough figure based on the above facts.

One sees the top of a tree on the bank of a river at an elevation of 70^circ from the other bank. Stepping 20 metres back, he sees the top. of the tree at an elevation of 55^circ . Height of the person is '1.4' metres. a) Draw a rough figure and mark the measurements. b) Find the height of the tree. c) Find the width of the river. '[tan 70=2.75 , tan 55=1.43]'

Two buildings in a plane ground are 20 metres apart. From the top of the smaller building, one sees the base of the building at a depression of 50^circ and its top at an elevation of 25^circ . a) Draw a rough figure and mark the measurements. b) Find the helght of the smaller building. c) Find the height of the bigger building. '[tan 50^circ=1.2, tan 25^circ=0.4]'

From the top of a building 15 meter high, one sees the top of another taller building at an angle of elevation of 70^circ and bottom at an angle of depression of 40^circ a) Draw a rough figure and mark the measurements given. b) Find the height of the taller building. [ tan 70 = 2.747,tan40 = 0.839 ]

A boy is standing between two building of equal height. The boy and the buildings are in a straight line. He see the tops of those buildings at elevations of 45^o and 30^o . The nearest building is 20 metres away from him. Find the height of the buildings and distance between the buildings.

A boy standing at one bank of a river sees the top of a tree on the other bank directly opposite to the boy at an elevation of 60^o . Stepping 40 metres back, he sees the top at an elevation of 30^o . Draw a rough figure and find the height of the tree.

A man, standing at the foot of a tower, sees the top of a building 20 metres away at an elevation of 60^o . Climbing to the top of the tower, he sees it at an elevation of 45^o .What is the height of the building?

A tower is built in a river of width 80 metres. One sees the top of the river at an elevation of 55^circ and 65^circ . from either banks of the river. a) Draw a figure using the given measurements. b) Find the height of tower c) Find the distances to either banks from the foot of the tower. [tan 55^circ =1.43 , tan 65^circ =2.14]