There are 200 questions on a 3 hrexamination.Among these questions are 50 mathematics problems.It is suggestedthat twice as much time be spent on each maths problem as for each otherquestion.How many minutes should be spent on mathematics problems

• taking the time in min so convert time into min=60*3=180
  x= time spent on maths question
  2x=time spent on maths question
  x(200-50)+2x(50)=180
  150x+100x=180
  250x=180
  x=0.72
  now time spent on maths questions=2*0.72*50=72min
  
• 10 years agoHelpfull: Yes(15) No(2)
• 150*t+50*2*t=180min
  t=18/25
  maths=50*2*t=72min
• 10 years agoHelpfull: Yes(12) No(0)
• time for other=x,time for math=2x
  x+2x=180
  3x=180
  x=60
  time for math=2x=2*60=120ans
• 10 years agoHelpfull: Yes(7) No(7)
• let x be the time taken to solve a question
  200 ques to solve in 180 min
  50 maths ques so time taken to solve them=50*2*x
  time taken to solve remaining 150 ques=150*x
  total time is=150*x plus 50*2*x=180
  this gives x=0.72
  which is the time to solve each question now since time required to solve maths problem is double and there are 50 questions so we get=50*2*0.72=72min
• 10 years agoHelpfull: Yes(4) No(0)