A ladder 10 m long reaches a window 8m above the ground. Find the distance of the foot of the ladder from base of the wall.

A man holds a 10 kg box 2m above the ground.What is the work done?

Two poles of heights 6 m and 11 m stand on a plane ground. If the distance between the feet of the poles is 12 m, find the distance between their tops.

A circus artist is climbing a 20 m long rope.which is tightly stretched and tied from the top of a vertical pole to the ground.Find the height of the pole,if the angle made by the rope with the ground level is 30^@ (see Fig 9.11)

A kite is flying at a height of 60 m above the ground.The string attached to the kite is temporarily tied to a point on the ground.The inclination of the string with the ground is 60^@ .Find the length of the string,assuming that there is no slack in the string.

A ladder is kept standing at a slanting position against a wall of a house and in this position the base of the ladder is at a distance of 9.5m from the wall.If the ladder makes an angle of 60^@ with the ground level,find the length of the ladder.

A ladder 12m long is leaning on a wall.Its foot 6m away from the wall.Find the angle it makes with the ground.

From a window h m high above the ground in a street, the angles of elevation and depression of the top and foot of the other house on the opposite side of the street as alpha and beta respectively show that height of the opposite house is h(1+tan alpha cos beta)m .

The angle of elevation of the top of a building from the foot of the tower is 30^@ and the angle of elevation of the top of the tower from the foot of the building is 60^@ .If the tower is 50 m high,find the height of the building

An aircraft is flying at a height of 3400 m above the ground. If the angle subtended at a ground observation point by the aircraft positions 10.0 s apart is 30^@ what is the speed of the aircraft?

A boy standing on a horizontal plane find a bird flying at a distance of 100m from him at an elevation of 30°. A girls standing on the roof of 20 m high building finds the angle of elevation of the same bird to be 45°.Both the boy and the girl are on opposite sides of the bird.Find the distance of the bird from the girl.