Problema Solution
How much water should be added to 60 litres of milk containing 20%cream,inorder to get milk containing 15% cream ?
Answer provided by our tutors
let
w = liters of water (0% of cream) needed for the mix
c = 60 liters of milk containing 20%cream needed for the mix,
w + 60 liters of the mix containing of 15% cream
% of cream in w liters water + 20% cream of 60 liters = 15% cream of (w + 60) liters
w*0 + 0.20*60 = 0.15(w + 60)
by solving the equation we find
w = 20 liters
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20 liters of water should be added.