In what ratio must water be added to 10 litres of milk at Rs.20 per litre so that cost of mixture is Rs.16 per litre?

a. 3:2
b. 1:4
c. 2:3
d. 4:1

• a. 1:4
  C.P of 1 Lt of water =Rs.0
  C.p Of 1 lt of Milk= Rs.20
  So,
  o(Cheaper) 20(Dearer)
  
  16(Mixture)
  
  4 : 16
  (Dearer-Mixture) (Mixture-Cheaper)
  so,
  (Note: Just cross check)
  4:16=1:4
  
• 8 years agoHelpfull: Yes(21) No(0)
• Ans.B
  cost of 10L milk =10*20=Rs.200
  cost of 1L milk after mixing water=Rs.16
  Mixture of Milk & Water=200/16=12.5L
  So Amount Of Water Mixed= 12.5-10=2.5L
  Given, Ratio Of WATER to added to MILK= 2.5:10 = 1:4
  For Every 4L of Milk We should Add 1L of Water
  
• 8 years agoHelpfull: Yes(9) No(0)
• Ans: 4:1
  total amount of 5 liters of mixture=5*16=80
  total amount of milk in the mixture=4*20=80
  
• 8 years agoHelpfull: Yes(7) No(15)
• correct ans is 1:4
• 8 years agoHelpfull: Yes(7) No(4)
• cost of 10 ltrs of milk =10*20=200rs
  cost of 1 lter mixture =16rs
  required mixer ( water+milk) say as X
  here no loss or profit
  so X*16=200
  X=200/16=12.5lters so water is 2.5 ltrs
  ratio of milk and water= 10:2.5=4:1
  
• 8 years agoHelpfull: Yes(2) No(3)
• 10 lit milk cost 20 Rs
  For 1Rs, Milk = 1/2 lit
  For 16Rs, Milk = (1/2)*16 = 8 lit (Milk)
  Total quantity should be 10 litres.
  so 10 - 8 = 2 lit ( water have to add)
  Now ratio = 2(water) : 8(Milk) = 1:4 -Ans
• 7 years agoHelpfull: Yes(2) No(0)
• Can any one explain clearly
• 8 years agoHelpfull: Yes(1) No(4)