IMO Mathematics Olympiad Class 9: Questions 274  278 of 919
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Question number: 274
Question
A running track is the ring formed by two concentric circles. It is 10 feet wide. The circumferences of the two circles differ by about ________.
Choices
Choice (4)  Response  

a.  100 feet 

b.  10 feet 

c.  30 feet 

d.  60 feet 

Question number: 275
» Lines, Angles and Quadrilaterals
Question
The area of trapezium JKLM is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 276
» Lines, Angles and Quadrilaterals
Question
The angle between two altitudes of a parallelogram through the vertex of an obtuse angle of the parallelogram is 60°, Then the angles of the parallelogram is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 277
Question
In the given figure, the area of shaded portion is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 278
Question
In triangle HKM, the altitude from H to KM meets KM at J, and the altitude from K to HM meets HJ at S. if , and , if then the length of SJ is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

