61.A statue 1.46 m. tall stands on the top of a pedestal. From a point on the ground the angle of elevation of the top of statue is 60° and from the same point, the angle of elevation of the top of the pedestal is 45° find the height of the pedestal.
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62.The angle of elevation of a jet fighter from a point A on the ground is 60°. After a flight of 15 seconds, the angle of elevation changes to 30°. If the jet is flying at a speed of 720 km/hour, find the constant height at which the jet is flying.
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63.A man on the deck of a ship 14 m above water level, observes that the angle of elevation of the top of a cliff is 60° and the angle of depression of the base of the cliff is 30°. Calculate the distance of the cliff from the ship and the height of the cliff.
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64.The height of a tower is 10 m. Calculate the height of its shadow when Sun's altitude is 45°.
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65.In the following figure, what are the angles of depression from the observing positions O1 and O2 of the object at A?
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66.Find the angle of elevation of the Sun's altitude when the height of shadow of a vertical pole is equal to its height.
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67.In figure, what are the angles of depression of depression of the top and bottom of h m tall building from the top of multistoryed building.
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68.
From a point 20 m away from the foot of a tower, the angle of elevation of the top of the tower is 30°, Find the height of the tower.
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69.In figure, what are the angles of depression from the positions O1 and O2 of the object at A?
The string of akite is 100 m long and its makes an angle of 60° with the horizontal. Find the height of the kite. Assume that there is no slackness in the string.
Lenght of string OA = 100 m. Angle of elevation = 60°. Let the heigth of the kite be AB = h m.
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