a family uses a mixture of a blend of two coffees costing rs.30 and rs.60 respectively . if the family uses only the expensive vareity it will have to spend rs.450 more. the annual consumption of coffee of the family is 20kgs in what ratio the two blends beng used?

• x+y=20
  60*20-(30x+60y)=450
  solving we get x=15 and y=5
  ratio x:y=3:1
• 11 years agoHelpfull: Yes(8) No(3)
• 3:1
  cost of 20 kg of exp. coffee=20*60=1200
  xtra cost=450
  blended cost=1200 - 450 = 750
  let cheap cofee=x kg,expensive=20-x kg
  30x + (20-x)60=750
  on solving,x=15..
  therefore ratio=15/5=3:1
• 11 years agoHelpfull: Yes(2) No(1)