IMO Mathematics Olympiad (SOF) Class 8: Questions 485  490 of 1030
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Question number: 485
Question
In the given figure PQRS is a square inscribed in a circle with center O and radius r. The total area of shaded region is________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 486
Question
The dimensions of an open box are 60 cm, 50 cm and 33 cm. Its thickness is 3 cm. If 1 cubic cm of metal used in the box weights 0.5 gm, find the weight of the box.
Choices
Choice (4)  Response  

a.  13.860 kg 

b.  14.56 kg 

c.  12.11 kg 

d.  13 kg 

Question number: 487
Question
The volume of a cube is 343, its surface area is________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


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. 

