# CBSE Class 10-Mathematics: Chapter –9 Some Applications of Trigonometry Part 3

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**Question 9:**

A tall girl stands at a distance of from a lamp post and casts a shadow of on the ground, then the height of the lamp post is

(a)

(b)

(c)

(d)

**Answer:**

(a)

**Question 10:**

A tree breaks due to storm and broken part bends so that the top of the tree touches the ground making an angle of with ground. If the distance between the foot of the tree to the point where the top touches the ground is , then the height of the tree is

(a)

(b)

(c)

(d)

**Answer:**

(c)

**Question 11:**

The angle of elevation of the sun when the length of the shadow of a pole is times, then height of the pole is

(a)

(b)

(c)

(d)

**Answer:**

(a)

**Question 12:**

From the figure, the angle of elevation is

**Answer:**

**Question 13:**

(a)

(b)

(c)

(d)

**Answer:**

(b)

**Question 13:**

A person walking towards a chimney in a horizontal line through its bare observer that its angle of elevation changes from , then height of chimney is

(a)

(b)

(c)

(d)

**Answer:**

(b)

**Question 14:**

Find height of the tower if length of shadow and sun’s altitude .

(a)

(b)

(c)

(d) None of these

**Answer:**

(a)