Surface Area and Volumes (IMO Mathematics Olympiad (SOF) Class 9): Questions 64  68 of 104
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Question number: 64
» Surface Area and Volumes
Question
A cylindrical rod whose height is 8 times of its radius is melted and recast into spherical balls of same radius. The numbers of balls will be________
Choices
Choice (4)  Response  

a.  3 

b.  6 

c.  4 

d.  8 

Question number: 65
» Surface Area and Volumes
Question
The area of a quadrilateral, one of whose diagonals is 50 cm long and the perpendiculars from the other two vertices are 14 cm and 21 cm respectively is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 66
» Surface Area and Volumes
Question
A rectangular park 60 m long and 40 m wide has two concrete crossroads running in the middle of the park and rest of the park has been used as a lawn. The area of the lawn is 2109 sq. m. What is the width of the road?
Choices
Choice (4)  Response  

a.  3 m 

b.  6 m 

c.  7 m 

d.  2 m 

Question number: 67
» Surface Area and Volumes
Question
The base of a prism is a triangle whose sides arc of lengths 13 cm, 20 cm and 21 cm. if the height of the prism be 9 cm. find the area of total lateral surface, volume of the prism
Choices
Choice (4)  Response  

a.  1543 c. cm. 

b.  1134 c. cm. 

c.  1754 c. cm. 

d.  1865 c. cm. 

Question number: 68
» Surface Area and Volumes
Question
A rectangle is divided into five smaller rectangles, as shown in the figure. Four of them have areas, , and as indicated. Then the area of the shaded rectangle is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

