IMO Level 1 Mathematics Olympiad (SOF) Class 8: Questions 471  476 of 1040
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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. 

Question number: 472
Question
A quadrilateral whose one diagonal is 4 cm. If the length of altitudes from opposite vertices on the diagonal is 2.5 cm and 1.5 cm, then the area of quadrilateral is ________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 473
Question
The number of surfaces in right circular cylinder is________.
Choices
Choice (4)  Response  

a.  1  
b.  2  
c.  3  
d.  4 
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.  40  
c.  42  
d.  25 