Question 1207753
15 liters filled full 40% antifreeze

want drain and replace with 100% antifreeze to achieve 60%


v, volume to remove and replace
Keeping same volume of 15 liter for the cooling system


{{{(15*0.4-0.4v+1*v)/15=0.6}}}


{{{(0.4*15+v-0.4v)/15=0.6}}}


{{{0.4*15+(1-0.4)v=0.6*15}}}


{{{0.6*15-0.4*15=0.6v}}}

{{{v=(0.6*15-0.4*15)/0.6}}}

{{{v=0.2*15/0.6}}}

{{{highlight(v=5)}}}