9

Q1. If the height and length of the shadow of a man are the same, then the angle of elevation of the sun is

30^o

60^o

45^o

15^o

Q2. If the angle of elevation of a cloud from a point 100 metres above a lake is 30^o and the angle of depression of its reflection in the lake is 60^o, then the height of the cloud above the lake is

100 m

200 m

500 m

30 m

Q3. A kite is flying, attached to a thread which is 165 m long. The thread makes an angle of 30⁰ with the ground. The height of the kite from the ground, assuming that there is no slack in the thread is

80 m

81.5 m

82.5 m

84 m

Q4. A 20 m long ladder touches the wall at a height of 10 m. The angle which the ladder makes with the horizontal is

30^o

45^o

60^o

90^o

Q5. A ladder leaning against a wall makes an angle of 60⁰ with the wall. If its foot is 6.2 m away from the wall, its length is

14.2 m

12.4 m

8 m

10.2 m

Q6. An observer 1.5 m tall is 28.5 m away from a tower. The angle of elevation of the top of the tower from his eyes is 45⁰. The height of the tower is

10 m

20 m

30 m

40 m

Q7. A tower stands vertically on the ground. From a point C on the ground, which is 20 m away from the foot of the tower, the angle of elevation of the top of the tower is found to be 45⁰. The height of the tower is

15 m

20 m

8 m

10 m

Q8. The horizontal distance between two towers is 140 m. The angle of elevation of the top of the first tower when seen from the top of the second tower is 30^o. If the height of the second tower is 60 m then, the height of the first tower is

135 m

139.5 m

140.83 m

142 m

Q9. The angle formed by the line of sight with the horizontal, when the point being viewed is above the horizontal level is called:

Vertical angle

Angle of depression

Angle of elevation

Obtuse angle

Q10. The -------- is the line drawn from the eye of an observer to the point in the object viewed by the observer

Line of sight

Line of sight propagation

Line of incidence

Line of symmetry