NCO Cyber Olympiad (SOF) Class 9: Questions 372  375 of 520
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Question number: 372
» Mental Ability » Basic Algebra
Question
Anita has a broken fan belt on her car. The belt goes around 2 pulleys, whose centers are 30 cm apart and each pulley is 10 cm in diameter. How long should the belt be?
Choices
Choice (4)  Response  

a.  88.6 cm 

b.  23.6 cm 

c.  80.8 cm 

d.  91.4 cm 

Question number: 373
» Logical and Analytical Reasoning » Puzzle Test
Appeared in Year: 2011
Question
Find the missing number.
Choices
Choice (4)  Response  

a.  42 

b.  34 

c.  44 

d.  45 

Question number: 374
» Mental Ability » Basic Algebra
Question
Which expression describes the area in square units of a rectangle that has a width of and a length of ?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 375
» Logical and Analytical Reasoning » Puzzle Test
Appeared in Year: 2011
Question
Observe the following notations:
The time taken by two running trains for crossing each other is calculated by dividing the sum of the lengths of two trains by the total speed of the two trains. If the length of first train is , the length of second train is , the speed of first train is , and the speed of the second train is , which of the following expressions would represent the time taken?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d.  None of the above 
