Surface Area and Volumes (IMO Mathematics Olympiad Class 9): Questions 19  23 of 104
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Question number: 19
» Surface Area and Volumes
Question
A spherical ball of lead, 5 cm in diameter is melted and recast into two spherical balls. The diameter of one of these is 4 cm. The radius of the second ball is________
Choices
Choice (4)  Response  

a.  2.51 cm 

b.  3.51 cm 

c.  2.26 cm 

d.  3.94 cm 

Question number: 20
» Surface Area and Volumes
Question
A cone and a hemisphere have the same height and same radius of the base. The ratio between the volumes of the cone and the hemisphere is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 21
» Surface Area and Volumes
Question
The area of a quadrilateral ABCD, in which, is an equilateral triangles of side 24 cm and is________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 22
» Surface Area and Volumes
Question
The parallel sides of a trapezium are 60 cm and 77 cm and nonparallel sides are 26 cm and 26 cm. The approximate area of trapezium is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 23
» Surface Area and Volumes
Question
In the given figure, the area of shaded portion is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

