IMO Mathematics Olympiad Class 8: Questions 488  493 of 1029
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Question number: 488
Question
A cylinder whose cross section is an ellipse is called ________ cylinder.
Choices
Choice (4)  Response  

a.  Elliptic  
b.  Parabolic  
c.  Hyperbolic  
d.  All of the above 
Question number: 489
Question
If a wire is bent into the shape of a square, then the area of the square is 64 sq. cm. When the wire is bent into a semicircular shape, then the area of the semicircle will be________.
Choices
Choice (4)  Response  

a. 
 
b.  
c. 
 
d. 

Question number: 490
Question
The volume of a cube is 729 , its surface area is________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 491
Question
A metal sheet 125 cm long, 64 cm broad and 27 cm thick is melted into a cube. The difference between surface areas of two solids is________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 492
» Direct and Inverse Proportions
Question
can do a piece of work in 15 days and can do alone it in 10 days. B works at it for 6 days and then leaves. alone can finish the remaining work in________.
Choices
Choice (4)  Response  

a.  5 days  
b.  6 days  
c.  7.5 days  
d.  6.5 days 
Question number: 493
Question
Which of the following values are equal?
(1) (2) (3) (4)
Choices
Choice (4)  Response  

a.  1 and 2  
b.  2 and 3  
c.  1 and 3  
d.  1 and 4 