Mensuration (IMO Mathematics Olympiad (SOF) Class 8): Questions 24  30 of 61
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Question number: 24
» Mensuration
Question
If the area of a triangle with base a is equal to area of a square of side a, the altitude of the triangle is________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 25
» Mensuration
Question
Two cubes have their volumes in the ratio 1: 64. Find the ratio of their surface areas.
Choices
Choice (4)  Response  

a.  1: 9 

b.  16: 3 

c.  7: 9 

d.  1: 16 

Question number: 26
» Mensuration
Question
The radius of a cylinder is tripled but its lateral surface area is unchanged. Then its height must be________.
Choices
Choice (4)  Response  

a.  Halved 

b.  One third 

c.  Doubled 

d.  Constant 

Question number: 27
» Mensuration
Question
A cylindrical tower is 7 meters in diameter and 15 meters height. The cost of white washing its curved surface at 75 paisa per is
Choices
Choice (4)  Response  

a.  257 

b.  250 

c.  240 

d.  247 

Question number: 28
» Mensuration
Question
A hoop is resting vertically at staircase as shown in the diagram. AB = 8 cm and BC = 4 cm. The radius of the hoop is________.
Choices
Choice (4)  Response  

a.  12 cm 

b.  10 cm 

c.  14 cm 

d.  11 cm 

Question number: 29
» Mensuration
Question
The radius of a cylinder is doubled but its lateral surface area is unchanged. Then its height must be________.
Choices
Choice (4)  Response  

a.  Constant 

b.  Halved 

c.  Doubled 

d.  Tripled 

Question number: 30
» Mensuration
Question
Between a square of perimeter 36 cm and a circle of circumference 36 cm, which figure has larger area and by how much?
Choices
Choice (4)  Response  

a.  Circle, 22 

b.  Square, 22 

c.  Circle, 26 

d.  None of the above 
