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

• if we take x mins for non-maths of 150 questions
  then time taken = 150*x
  maths 50 question time=50*2x
  total 200 question time is 3 hours
  (150*x)+(50*2x)=180min
  x=0.72
  then 50 que time=72min
• 11 years agoHelpfull: Yes(25) No(1)
• ans is 72
  soln:
  50 math que. in 72 min so 1 math is in 1.44 min.
  so 0.72 min/que. is needed to solve remaining 150 que.
  s0 total = 72 + 0.72*150 = 180
  so ans is 72 min.
• 12 years agoHelpfull: Yes(12) No(5)
• Answer:36
  No. of Non.Math Problem to be solved is 150(let it take x minutes)
  No. of Math problem to be solved is 50(it takes 2x minutes)
  Hence the equation:
  150x+100x=180minutes
  Solving we get x=0.72 minutes
  For Solving Maths problems=50*0.72=36 minutes
• 12 years agoHelpfull: Yes(8) No(25)
• total time duration is 180 mins we have to div it by 5 we get =180/5=36 mins
  for 150 qns it will take 3*36 =108
  for 50qns it will take 2*36=72 mins
  that means each qn take 0.72 mins for 150 qns and 1.44 mins for 50 qns each.
  
• 10 years agoHelpfull: Yes(1) No(1)