Problema Solution
how many gallons of 80% antifreeze solution nuar bw mixed with 90 gallons of 15% antifreeze to get a mixture that is 70% antifreeze?
Answer provided by our tutors
let x gallon mixed so total antifreeze = 0.8x +.15*90 = 0.8x+13.5
total volume = 90+x
so
0.8x+13.5 /90+x = 0.70
0.8x +13.5 = 63+0.7x
0.1x = 63-13.5
x = 595 gallon