Problema Solution
how many gallons of 50% antifreeze solution nuar bw mixed with 90 gallons of 25% antifreeze to get a mixture that is 40% antifreeze?
Answer provided by our tutors
let x gallon mixed
totql antifreeze = 0.5x+0.25*90
total volume = 90+x
0.5x+22.5/90+x = 0.4
0.5x+22.5 = 36+0.4x
0.1x = 36-22.5
x = 135 gallon