arun makes a popular a brand of icecream in a rectangular shapeds bar 6cm long,5cm wide and 2cm thick to cut costs the company has decided to reduce the volume of the bar by 19% the thickness will remain the same but the length and width will be reduced by same percentage the new width will be a)7.5 b)6.5 c)4.5 d)5.5

• we have to reduce the width, then
  new width < old width(5);
  new width
• 8 years agoHelpfull: Yes(17) No(0)
• Volume =l×b×h = 6×5×2 = 60 cm3
  Now volume is reduced by 19%.
  Therefore, new volume = (100−19)100×60=48.6
  Now, thickness remains same and let length and breadth be reduced to x%
  so, new volume: (x100×6)(x100×5)2=48.6
  Solving we get x =90
  thus length and width is reduced by 10%
  New width = 5-(10% of 5)=4.5
  
  ans c)4.5
• 8 years agoHelpfull: Yes(7) No(0)
• Volume = l*b*h
  6*5*2 = 60cm^3
  Volume is reduced by 19%
  New Volume = (100-19)100*60 = 486000 = 48.6
  Thickness is same but length and breadth reduces by x%
  new volume = (x/100*6)(x/100*5)2 = 48.6
  x=90
  Length and Breadth reduced by 10%
  new width = 5-(10 * 5/100)
  = 4.5
• 4 years agoHelpfull: Yes(0) No(0)