In what proprotion water to be mixed with spirit to gain 12.5% by selling it at cost price

• Let the quantity of spirit be y and water added to it be x so as to make 12.5% gain on original CP.
  [CP*(x+y)-CP*y]/CP*y = 12.5/100
  x/y=1/8
  
• 10 years agoHelpfull: Yes(10) No(0)
• consider price of spirit to be 10
  and of water be 0(although there is a shortcut the ans is 1/8)
  now (10s + 0w)/(s+w) * 12.5/100 = 10(as it is sold at c.p)
  this will give you w/s as 1/8
  
  
• 10 years agoHelpfull: Yes(1) No(0)
• x% of y= (x*100)/y=12.5
  x/y=1/8
• 10 years agoHelpfull: Yes(1) No(0)
• let, c.p of milk=1rs./lt
  s.p of 1lt mixture=1rs.
  12.5% gain so,c.p of mixture=100*1/112.5=8/9
  apply alligation,
  0 1
  8/9
  1-8/9 =1/9 8/9-0=8/9
  so ratio=1/9:8/9=1:8
• 9 years agoHelpfull: Yes(1) No(0)
• Let cost price of spirit =Rs.1
  cost price of water = Rs. 0
  cost price of mixture=Rs.8/9
  ratio=1:8
• 9 years agoHelpfull: Yes(0) No(0)