Surface Area and Volumes (IMO Mathematics Olympiad Class 9): Questions 42  47 of 104
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Question number: 42
» Surface Area and Volumes
Question
A circular park of 80 metre diameter has a circular path just inside the boundary of width 8 metre. The area of path is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 43
» Surface Area and Volumes
Question
If the volumes of two cones are in the ratio 2: 3 and their diameters are in the ratio 3: 7, and then the ratio of their heights is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 44
» Surface Area and Volumes
Question
The length of canvas 1.2 m wide required building a conical tent of height 14 m and also on the floor of floor area , breadth of canvas is ________
Choices
Choice (4)  Response  

a.  665 m  
b.  770 m  
c.  490 m  
d.  860 m 
Question number: 45
» Surface Area and Volumes
Question
If the altitude of an equilateral triangle is , its area is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 46
» Surface Area and Volumes
Question
What change in percent is made in the area of a rectangle by increasing its length by and breadth by ?
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 47
» Surface Area and Volumes
Question
The base of a prism is a right angle triangle and the two sides containing the right angle are 8 cm and 15 cm. if its height is 20 cm, then the volume of the prism is ________
Choices
Choice (4)  Response  

a.  600 c. cm.  
b.  1200 c. cm.  
c.  300 c. cm.  
d.  160 c. cm. 