169. 9 liters of water were poured into the radiator of a car and 2 liters of methyl alcohol were added.
(ρ = 0.8 g/ml). What is the lowest temperature at which you can then leave the car in the open air without fear that the water in the radiator will freeze?

If you do not open the file - install the RAR archiver. Inside the archive you will find a solution in Word format.