IMO Level 1 Mathematics Olympiad (SOF) Class 9: Questions 250  255 of 929
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Question number: 250
Question
A triangle and a trapezoid are equal in area. They also have the same altitudes. If the base of the triangle is 18 inches, the mean of the parallel sides of the trapezoid is ________
Choices
Choice (4)  Response  

a.  18 inches  
b.  9 inches  
c.  Not obtained from this data  
d.  36 inches 
Question number: 251
Question
The area of an isosceles triangle having base 32 cm and one side 20 cm is________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 252
Question
A circular park of 20 metre diameter has a circular path just inside the boundary of width 1 metre. The area of path is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 253
Question
What is the point of concurrency of the perpendicular bisectors in a triangle called ________.
Choices
Choice (4)  Response  

a.  Centroid  
b.  Incentre  
c.  Orthocentre  
d.  Circumcentre 
Question number: 254
Question
A covered wooden box has the inner measures as 115 cm, 75 cm, 35 cm and the thickness of wood is 2.5 cm. Then the volume of the wood is________
Choices
Choice (4)  Response  

a.  80,000 cu. Cm  
b.  82,125 cu. Cm  
c.  85,000 cu. Cm  
d.  84,000 cu. Cm 
Question number: 255
» Lines, Angles and Quadrilaterals
Question
A triangle and a parallelogram are equal in area. They also have the same altitude. If the base of the triangle is 22 inches, the area of the trapezoid is ________.
Choices
Choice (4)  Response  

a.  19 inches  
b.  11 inches  
c.  Not obtainable from these data  
d.  2 inches 