NRA CGL (National Recruitment AgencyCombined Graduate Level) Mathematics: Questions 379  385 of 425
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Question number: 379
Question
The length of a rectangle is decreased by 10 % and its breadth is increased by 5%. By what percent its area changed?
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 380
» Fundamental Arithmetical Operations
Question
If ( ) is 10 more than ( ) and ( ) is 4 less than ( ), then ( ) is
Choices
Choice (4)  Response  

a. 
 
b.  1.5  
c. 
 
d. 

Question number: 381
Question
A man travels a distance of 30 km at 6 km/hr another distance of 30 km at 5 km/hr and a third distance of 30 km at 10 km/hr. his average speed for the whole journey (in km/hr) is
Choices
Choice (4)  Response  

a.  8  
b. 
 
c. 
 
d.  9 
Question number: 382
Question
When simplified, the product
gives
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 383
» Average
Question
The average marks of 60 students in a test is 80. Later it is found that three marks 76,74& 80 were wrongly entered as 75,76 & 86. The average marks after mistakes were rectified is
Choices
Choice (4)  Response  

a. 
 
b.  79.67  
c.  72.44  
d.  79.88 
Question number: 384
Question
LCM of 0.10, and is
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 385
Question
A person divides his total distance of journey into three equal and decides to travel the three parts with speeds of 10,20 and 30 km/hr. find his average speed. (In km/hr)
Choices
Choice (4)  Response  

a. 
 
b.  58.16  
c.  16.36  
d. 
