IMO Mathematics Olympiad Class 8: Questions 473  478 of 1029
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Question number: 473
Question
The number of surfaces in right circular cylinder is________.
Choices
Choice (4)  Response  

a.  1 

b.  4 

c.  3 

d.  2 

Question number: 474
Question
If the area of a cylinder with radius r = 1 and height h = 2 is equal to area of a cone with radius r = 1 and height h, the height of the cone is________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 475
Question
A quadrilateral whose one diagonal is 5.5 cm. If the length of altitudes from opposite vertices on the diagonal is 2.5 cm and 3.5 cm, then the area of quadrilateral is ________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 476
Question
ABC is a rightangled triangle with. AH is drawn perpendicular to BC where H lies on BC. If AB = 30 cm and AC = 50 cm, then BH = ________.
Choices
Choice (4)  Response  

a.  50 

b.  42 

c.  40 

d.  25 

Question number: 477
Question
A right cylindrical vessel is full with water, how many right cones having same diameter and height as that of right cylinder will be needed to store that water?
Choices
Choice (4)  Response  

a.  3 

b.  4 

c.  2 

d.  5 

Question number: 478
Question
The ratio of radii of two cylinders is 1: and heights are in the ratio 3: 2. The ratio of their volume is________.
Choices
Choice (4)  Response  

a.  1: 4 

b.  1: 2 

c.  3: 4 

d.  2: 3 
