IMO Mathematics Olympiad (SOF) Class 10: Questions 867  872 of 958
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Question number: 867
Question
An observer tall is away from a chimney. The angle of elevation of he top of the chimney from her eyes is the height of the chimney is________.
Choices
Choice (4)  Response  

a.  0.52 

b.  9.86 

c.  9.02 

d.  2.5 

Question number: 868
Question
If then value of is________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 869
Question
If is equal to________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 870
Question
The top of two poles of height and are connected by a wire. If the wire makes an angle of with horizontal, then the length of the wire is________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 871
Question
The length of a string between a kite and a point on the ground is . If the string makes an angle with level ground such that how high is the kite?
Choices
Choice (4)  Response  

a. 


b.  44.96m 

c. 


d.  76.96m 

Question number: 872
Question
The angles of depression of two ships from the top of a lighthouse are towards east. If the ship are 50m apart, the height of the lighthouse is________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

