NRA CGL (National Recruitment AgencyCombined Graduate Level) Mathematics: Questions 404  408 of 425
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Question number: 404
» Average
Question
The distance between two stations P and Q is 1200 km. A train starts from P and moves towards Q at an average speed of 40 km/hr. another train starts from Q at the same time and moves towards P at an average speed of 80 km/hr. How far from P will they cross each other?
Choices
Choice (4)  Response  

a.  600 km  
b.  200 km  
c.  400 km  
d.  500 km 
Question number: 405
» Surds
Question
The square root of is
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 406
» Average
Question
The distance between two stations P and Q is 800 km. A train starts from P and moves towards Q at an average speed of 30 km/hr. another train starts from Q at the same time and moves towards P at an average speed of 70 km/hr. How far from P will they cross each other?
Choices
Choice (4)  Response  

a.  240 km  
b.  100 km  
c.  541 km  
d.  300 km 
Question number: 407
» Surds
Question
The square root of is
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 408
» Average
Question
In a school with 1800 students, the average age of boys is 20 years and that of the girls is 19 years and 11 months. If the average age of the school is 19 years and 7 months, then the number of the girls in the school is
Choices
Choice (4)  Response  

a.  100  
b.  600  
c.  800  
d.  900 