if length,breadth,height of cube are decreased,decreased & increased by5%,5%,20% respectively then what will be the impact of surface area of cube?

• lenght ,breadth and height= side of cube..
  assume side of cube as 100.
  then
  100--->5% dec=95
  95--->5% dec =90.25
  90.25--->20% inc =108.33
  hence net effect =(108.33-100)=8.33 ans
• 8 years agoHelpfull: Yes(9) No(5)
• INCREASE BY 8.3%
• 8 years agoHelpfull: Yes(2) No(2)
• increased by 20.75 %
• 8 years agoHelpfull: Yes(2) No(0)
• effective decrease -- (-5-5+25/100) = -39/4
  then, effective increase (-39/40 + 20 - 780/100)= 49/20.
  ans is 49/20.
• 8 years agoHelpfull: Yes(1) No(2)
• can u plz tell me the correct ans of this prob
• 8 years agoHelpfull: Yes(1) No(2)
• the surface area of cube is 6l^2 so why we are not using it
• 8 years agoHelpfull: Yes(1) No(0)
• gain-6.08%
• 8 years agoHelpfull: Yes(1) No(0)
• Surface=6x^2=2(lb+bh+lh)
  
  =2(0.95x*0.95x+0.95x*1.2x+0.95x*1.2x)
  
  =1.9(0.95x^2+1.2x^2+1.2x^2)
  
  = 1.9(3.35x^2)
  
  =6.365x^2
  
  % increase =6.365/6*100–100
  
  = 6.1% increase in surface area.
  
  Hope it helps.
  
  Good luck
• 5 years agoHelpfull: Yes(1) No(0)
• decreased by 9.8%
• 8 years agoHelpfull: Yes(0) No(2)
• answer is 8.3
• 8 years agoHelpfull: Yes(0) No(3)
• decreased by 9.75%
  
• 8 years agoHelpfull: Yes(0) No(4)
• plz send me at my email: rukesh.kmr@gmail.com
  
  plz as soon as possible bcz only 1 week left
• 8 years agoHelpfull: Yes(0) No(0)
• guys can anyone pls send me the TCS previous papers , one week left
  
  krishnapriyabadam@gmail.com
• 8 years agoHelpfull: Yes(0) No(0)