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There are 200 questions on a 3 hr examination. Among these questions are 50 mathematics problems. It is suggested that twice as much time be spent on each maths problem as for each other question. How many minutes should be spent on mathematics problems

A.36
B.72
C.60
D.100

B



  
Total Answers and Comments: 4 Last Update: October 27, 2009   
  
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May 29, 2008 07:05:46   #1  
rajupriya Member Since: May 2008   Contribution: 2    

RE: There are 200 questions on a 3 hr examination. Among these questions are 50 mathematics problems. It is suggested that twice as much time be spent on each maths problem as for each other question. How many minutes should be spent on mathematics proble
Total number of questions 200
number of maths prblm 50
examination hours 3 hours


converting hours into minutes 3*60 180minutes
Number of other questions 200-50 50
Time taken to complete 150 questions 150*0.72 mins 108 mins
(for maths prblms the time taken to complete each ques should be doubled than taken for the other ques)
Time taken to complete 50 maths prblm 50*1.44 mins 72 mins

 
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June 13, 2008 11:20:10   #2  
subbu_raja36 Member Since: June 2008   Contribution: 3    

RE: There are 200 questions on a 3 hr examination. Among these questions are 50 mathematics problems. It is suggested that twice as much time be spent on each maths problem as for each other question. How many minutes should be spent on mathematics proble
other question 150

maths 50

total time 3hours 180 min

as maths takes twice the time of other ..the equation can be made as

x time for one question

(150*x)+(50*2x) 180

150x+100x 180

250x 180

x .72 min

for maths 2x so 1.44min

50*1.44 72min

 
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October 02, 2009 12:18:03   #3  
poornachander bethi Member Since: October 2009   Contribution: 1    

RE: There are 200 questions on a 3 hr examination. Among these questions are 50 mathematics problems. It is suggested that twice as much time be spent on each maths problem as for each other question. How many minutes should be spent on mathematics proble
Let M minutes spend on each math question

then 50M + ( 200 - 50 )( M / 2) 3 x 60 min.
> 50M + 150 x M/2 180 min.
> 50M + 75M 180 min.
>125M 180 min.
> M 180/125 min.
> M 1.44min

Answer: Each math question spends 1.44 min.
50 math question spend a total of 72 min.

 
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October 27, 2009 03:22:41   #4  
Ambika Naik Member Since: October 2009   Contribution: 1    

RE: There are 200 questions on a 3 hr examination. Among these questions are 50 mathematics problems. It is suggested that twice as much time be spent on each maths problem as for each other question. How many minutes should be spent on mathematics proble
Total Questions 200 and time duration 3hrs.
3hrs 180min
so answer is 72

 
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