IMO Mathematics Olympiad Class 8: Questions 465  471 of 1029
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Question number: 465
Question
The radius of the cylinder whose lateral surface area is 520 and height 5 cm, is________.
Choices
Choice (4)  Response  

a.  17 cm 

b.  14 cm 

c.  12 cm 

d.  11 cm 

Question number: 466
Question
Surface area of a cube with edge = 1.2 cm is________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 467
Question
Three solid cubes of sides 1 cm, 6 cm and 8 cm are melted to form a new cube. Find the surface area of the cube so formed.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 468
Question
The ratio of areas of two squares, one having triple its diagonals than the other is________.
Choices
Choice (4)  Response  

a.  5: 3 

b.  2: 3 

c.  2: 9 

d.  9: 1 

Question number: 469
Question
The ratio of areas of two squares, one having double its diagonals than the other is________.
Choices
Choice (4)  Response  

a.  9: 1 

b.  2: 9 

c.  2: 3 

d.  4: 1 

Question number: 470
Question
Three cubes whose edges are 1 cm, 6 cm, and 8 cm respectively are melted without any loss of metal into a single cube. The edge of new cube is________.
Choices
Choice (4)  Response  

a. 


b. 


c. 
 
d. 


Question number: 471
Question
What is the ratio of the perimeter of the shaded region to the circumference of the circle?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

