12. Arun makes a popular brand of ice cream in a rectangular shaped bar 6cm long, 5cm wide and 2cm thick. To cut costs, the company had decided to reduce the volume of the bar by 19%. The thickness will remain same, but the length and width will be decreased by some percentage. The new width will be,
option
a) 5.5
b) 4.5
c) 7.5
d) 6.5

• no need to solve the question..see through option.only 4.5 is less than 5.it is given breath is decreased.so 4.5 is ans
  
• 11 years agoHelpfull: Yes(67) No(0)
• ans:4.5
  volume=l*b*h=6*5*2=60cm^3
  now volume is reduced by 19%.therefore 81/100 *60=48.6
  now,thickness remains same and let length and breadth be reduced by x%
  so,new volume: 2*x/100 *6*x/100 *5=48.6
  =>x=90 thus length and width is reduced by 90%
  new width =90% of 5 =4.5
• 11 years agoHelpfull: Yes(20) No(0)
• all options are grater than 5 so acording to the question the new size will be less than previous size so obviously 4.5
• 11 years agoHelpfull: Yes(4) No(0)
• Answer should be 4.5cm
  because area got to be reduced by 19% too so 81% remaining can be distributed in length and width so new width = 0.9*original
• 11 years agoHelpfull: Yes(3) No(0)
• %change in (l+w+t)= %change in volume
  as t is constant thrfr l+w=19
  l=w (say)
  w=9.5
  new w= 5(0.91)
  w=4.55
  
• 11 years agoHelpfull: Yes(0) No(0)
• ans is 4.5
  first volume 6*5*2=60
  19%volume reduce ,so volume 48.6
  take volume 2xy
  2xy=48.6 so xy=24.3
  when length*wide=30 then width 5
  x*y=24.3 then wide=4.5
• 8 years agoHelpfull: Yes(0) No(0)