IMO Mathematics Olympiad (SOF) Class 9: Questions 428  432 of 919
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Question number: 428
Question
A circular park of 60 metre diameter has a circular path just inside the boundary of width 3 metre. The area of path is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 429
Question
Volume of a hemisphere is 27500 cubic cm. The total surface area is ________.
Choices
Choice (4)  Response  

a.  4158.45 sq. cm 

b.  5246.89 sq. cm 

c.  6548.23 sq. cm 

d.  9584.12 sq. cm 

Question number: 430
Question
In the figure , and . Then K equals ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 431
Question
In the given figure, AD is the bisector of and. Then, are congruent by which criterion?
Choices
Choice (4)  Response  

a.  SAS 

b.  AAA 

c.  ASA 

d.  All of the above 

Question number: 432
Question
A cylinder and a cone have the same height and same radius of the base. The ratio between the volumes of the cylinder and the cone is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

