If the side of a square is reduced by 40%, its area will reduce by
a.64%
b.80%
c.60%
d.50%

• a. 64%
  
  Let the original side of a square be 1, then area=1x1=1 sq. unit
  With 40% reduction, length of a side=0.6, so area=0.6x0.6=0.36 sq. unit
  So % reduction in area=(1 - 0.36)*100 = 64
• 6 years agoHelpfull: Yes(1) No(0)
• consider side=20 (at first)
  Area=20*20=400
  reduced to 40%,
  now side becomes,
  side=16
  Area=16*16=256
  
  By option a)
  (64/100)*400=256.
  ANS: Option A.
• 6 years agoHelpfull: Yes(0) No(0)
• reduced=40+40-40*40/100=80-16=64%
• 6 years agoHelpfull: Yes(0) No(0)
• consider side a =10m
  area of square = a*a
  =10*10
  =100
  if it is reduced by 40%
  side of square = 6
  area of square = a*a
  =6*6
  =36
  so,ANSWER = 64%
• 6 years agoHelpfull: Yes(0) No(0)