If a certain computer is capable of printing 4900 monthly credit card bills per hour, while a new model is capable of printing at a rate of 6600 per hour, the old model will take approximately how much longer than the new model to print 10000 bills?

• old model's 1 hr work = 4900
  new model's 1 hr work = 6600
  old model' time taken to print 10000 cards
  for 1 hr -- 4900 cards
  x -- 10000
  x= 10000/4900 = 100/49
  
  new model' time taken to print 10000 cards
  for 1 hr -- 6600 cards
  y -- 10000
  y= 10000/6600 = 100/66
  
  
  Difference is
  100/49 - 100/66 = 1700 /(49*66) = 850/(49*33) = 0.525 hrs => 31 mins
  
  Old model ll take 31 moreminutes to ptint 10000 bills
  
  Ans : 31 mins
  
  
  
• 10 years agoHelpfull: Yes(39) No(1)
• old model is capable of printing at a rate of 4900 per hour
  new model is capable of printing at a rate of 6600 per hour
  old model time taken to print 10000 cards =10000/4900 = 100/49
  new model time taken to print 10000 cards =10000/6600 = 100/66
  old model- new model: 100/49 - 100/66 = 1700 /(49*66) = 850/(49*33) = 0.525 hrs => 31 mins
  therefore, the old model will take approximately 31 mins longer than the new model to print 10000 bills
  
  answer :31 mins
  
• 10 years agoHelpfull: Yes(4) No(0)
• old computer takes 1/4900 per hour
  new takes 1/6600 per hour
  now, to print 10,000 bills-
  old takes =10000/4900=100/49
  new takes=10000/6600=100/66
  hence=100/49 - 100/66=31 mins
• 10 years agoHelpfull: Yes(1) No(0)
• old model's 1 hr work = 4900
  new model's 1 hr work = 6600
  old model' time taken to print 10000 cards
  for 1 hr -- 4900 cards
  x -- 10000
  x= 10000/4900 = 100/49
  
  new model' time taken to print 10000 cards
  for 1 hr -- 6600 cards
  y -- 10000
  y= 10000/6600 = 100/66
  
  
  Difference is
  100/49 - 100/66 = 1700 /(49*66) = 850/(49*33) = 0.525 hrs => 31 mins
  
  Old model ll take 31 moreminutes to ptint 10000 bills
  
  Ans : 31 mins
  
  2100/3196 = 0.66 hrs => 39minutes
  
  
  
• 10 years agoHelpfull: Yes(0) No(5)