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## Tuesday, October 11, 2011

### APPLICATION OF TRIGONOMETRY(Height and Distance)

10th Maths Test Paper
Q1 A ladder 15 m long just reaches the top of a vertical wall. If the ladder makes an angle of 60°with the wall, find the height of the wall. (7.5 √3 )
Q 2 A pole 12 m high casts a shadow 4 √3 m long on the ground. Find the angle of elevation (60°)
Q 3 The angle of elevation of the top of a tower from a point on the ground is 30° if on walking 30m towards the tower, the angle of elevation becomes 60°.Find the height of the tower.(15√3 )
Q 4 An observer 1.5m tall is 20.5m away from a tower 22m high. Determine the angle of elevation of the top of the tower from the eye of the observer. (45°)
Q 5 An aero plane when flying at a height of 5000m from the ground passes vertically above another aero plane at an instant when the angles of the elevation of the two planes from the same point on the ground are 60° and 45° respectively. Find the vertical distance between the aero planes at the instant. (2116.5m)