In a mixture of 90 litres, the ratio of milk and water is 4 : 2. How much water should be added to the mixture so that the ratio of milk and water becomes 6 : 4 ?
1) 50
2) 10
3) 40
4) 20
5) None of these

• 2) 10 liters
  
  Water in the 90 liter mixture= 90*2/6=30 liters and remaining 60 liters is milk
  If 'x' liters of water is added and ratio of milk and water becomes 6:4 , then
  60/(30+x) =6/4
  x=10
  
• 8 years agoHelpfull: Yes(5) No(3)
• Direct formula. X(ad-bc)/c(a+b)=90(4*4-6*2)/6(4+2)=10ans
• 8 years agoHelpfull: Yes(1) No(1)