CBSE Class 10-Mathematics: Chapter –9 Some Applications of Trigonometry Part 4
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Question 15:
If the angles of elevation of a tower from two points at distances a and b where , from its foot and in the same straight line from it are and
(a)
(b)
(c)
(d)
Answer:
(b)
Question 16:
The angle of elevation of the top of a tower from a point on the ground which is 30 m away from the foot of the tower is , then height of tower is
(a)
(b)
(c)
(d)
Answer:
(a)
Question 17:
If height of the tower shadow of the tower, then angle of elevation is
(a)
(b)
(c)
(d)
Answer:
(b)
Question 18:
If length of shadow and angle of elevation . Then height of tower is
(a)
(b)
(c)
(d)
Answer:
(d)
Question 19:
A little boy is flying a kite. The string of kite makes an angle of with the ground. If length of the kite is , then length of string is
(a)
(b)
(c)
(d)
Answer:
(b)
Question 20:
Line joining an eye and the object to be viewed is called
(a) Horizontal
(b) line of sight
(c) Vertical line
(d) None of these
Answer:
(b) Line of sight
2 Mark Questions
Question1:
A circus artist is climbing a 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 (see figure).
A Circus Artist is Climbing
Answer:
In right triangle ABC,
Hence, the height of the pole is .