In what ratio must water be mixed with milk to gain 20 % by selling the mixture at cost price?

• ans 1:5
  let cp of milk and water is 100 n 0 respectivly
  so 20% means at 100 20rs profit needed
  so must sell milk of rs 80 .. so 80/100 is 4/5.
  total mixture is 1 so 1-4/5=1/5..
• 11 years agoHelpfull: Yes(15) No(2)
• let the sp op 1 l mix is =re 1
  cp =(100/120)*1=5/6
  cp of one let. water =0
  so ratio=1-(5/6)/(5/6)-0=1/5
  so required ratio =1:5
  
• 11 years agoHelpfull: Yes(8) No(0)
• gain% = (error/(true value-error))* 100
  here, error=water & true value = milk
  hence, answer = m/w = 6 : 1
• 11 years agoHelpfull: Yes(1) No(8)
• in 5 litre milk mixed 1 litre i.e. 1/0.2
• 11 years agoHelpfull: Yes(0) No(8)