Fresh grapes contain 80% water by weight, whereas dried grapes contain 15% water by weight, how many kg of dried grapes can be obtained from 3.4 kg of fresh grapes?
a)0.51
b)0.6
c)0.68
d)0.8

• Let x kg dry grapes be obtained. Then, solid part in fresh grapes = solid part in dry grapes
  0.2*3.4=0.85 * X
  x=0.8
• 6 years agoHelpfull: Yes(3) No(0)
• Ans.
  3.4*{(100-80)/100}*{100/(100-15)}
  =3.4*(20/100)*(100/85)
  =.8kg
• 7 years agoHelpfull: Yes(1) No(0)
• 1kg fresh grapes=800gm water
  1kg dried grapes=150gm water
  800gm fresh grape=150gm dried grape
  0.8kg fresh grape=.15kg dried grape
  Now
  1kg fresh grape=0.15/0.8 kg dried grapes
  So
  3.4 kg fresh grape=3.4*(0.15/0.8)
  =51/80
  =0.6375 or 0.6
• 8 years agoHelpfull: Yes(0) No(2)
• ans--(c)
  
  1 kg of fresh grapes=200gm of pure grape
  
  200gm of pure grape=0.85*x (x=total weight of dried grape)
  
  x=200/0.85=
  
  Hence,
  
  1kg of fresh grapes produces---->200/0.85 kg of dried grapes
  
  so 3.4 kg of fresh grapes produces------>200/0.85 * 3.4kg of dried grapes=800gm=0.8kg
  
  
• 7 years agoHelpfull: Yes(0) No(0)
• 1 kg of fresh grapes=200gm of pure grape
  
  200gm of pure grape=0.85*x (x=total weight of dried grape)
  
  x=200/0.85=
  
  Hence,
  
  1kg of fresh produces---->200/0.85 kg of dried grapes
  sorry for the previous solution this is the correct one ,i typed c instead of d in the previous one
  ans---(d)
  
  so 3.4 kg of fresh produces------>200/0.85 * 3.4kg of dried grapes=800gm=0.8kg
  
  
• 7 years agoHelpfull: Yes(0) No(0)