Mathematics [NSTSE (National Science Talent Search Exam Unified Council) Class 9]: Questions 707  713 of 989
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Question 707
Question
MCQ▾A cylindrical vessel contains 37.044 liters of liquid. Cost of painting its CSA at 3 paise/sq cm is Rs. 90.72. Then its total surface area is ________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question 708
Question
MCQ▾If and then the value of is:
Choices
Choice (4)  Response  

a.  121  
b.  91  
c.  61  
d.  181 
Question 709
Question
MCQ▾The diameter of a copper sphere is 24 cm. It is beaten and drawn into a wire of diameter 1.2 cm. The length of wire is ________.
Choices
Choice (4)  Response  

a.  3200 cm  
b.  1600 cm  
c.  6400 cm  
d.  4600 cm 
Question 710
Question
MCQ▾The mean of is 16. Then the value of x is
Choices
Choice (4)  Response  

a.  Data is insufficient  
b.  21  
c.  Cannot be determined  
d.  16 
Question 711
Question
MCQ▾The daily sale of milk (in liters) in a ration shop for six days is as follows:
42,70,59,60,38.5 and 51.5 The average daily sale is
Choices
Choice (4)  Response  

a.  53.5  
b.  70  
c.  51.5  
d.  67.5 
Question 712
Question
MCQ▾The base radius of a cylinder is times its height. The cost of painting its CSA at is Rs. 71.28. The volume of the liquid is ________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question 713
Question
MCQ▾The mean of 20 observations is 12.5. By error, one observation was noted as 15 instead of 15. Then the correct mean is
Choices
Choice (4)  Response  

a.  11.75  
b.  11  
c.  14  
d.  None of the above 