IMO Mathematics Olympiad Class 9: Questions 421  424 of 919
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Question number: 421
Question
A rectangular field has its length and breadth in the ratio. Its area is 10.29 hectares. The cost of fencing it at RS. 8 per meter is ________
Choices
Choice (4)  Response  

a.  Rs. 15400 

b.  Rs. 14200 

c.  Rs. 11200 

d.  Rs. 21500 

Question number: 422
Question
The volume of the largest circular cone that can be cut of a cube whose edge is 16 cm is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 423
Question
In the figure , and . Then x equals ________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 424
Question
From each corner of a square of side 6 cm a quadrant of a circle of radius 2 cm is cut and also a circle of diameter 4 cm is cut as shown in the figure, then the area of the remaining portion of the square is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

