IMO Level 1 Mathematics Olympiad (SOF) Class 8: Questions 445  449 of 1040
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Question number: 445
Question
The radii of the bases of two cylinders are in the ratio of 3: 4 respectively and their heights are in the ratio 4: 5 respectively, find the ratio of their volumes.
Choices
Choice (4)  Response  

a.  3: 20 

b.  20: 3 

c.  20: 9 

d.  9: 20 

Question number: 446
Question
A rectangle field has its length and breadth in the ratio 2: 3. Its area is 3.80 hectares. The cost of fencing it at Rs. 2 per meter is________.
Choices
Choice (4)  Response  

a.  Rs 1500 

b.  Rs 1100 

c.  Rs 1600 

d.  Rs 1000 

Question number: 447
Question
ABC is a right angled triangle with. AH is drawn perpendicular to BC where H lies on BC. If AB = 40 cm and AC = 60 cm, then BH = ________.
Choices
Choice (4)  Response  

a.  40 

b.  25 

c.  30 

d.  50 

Question number: 448
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: 449
Question
The radius of the cylinder whose lateral surface area is 610 and height 6 cm, is________.
Choices
Choice (4)  Response  

a.  14 cm 

b.  11 cm 

c.  10 cm 

d.  12 cm 
