6 litres of 40% and 2 litres of 80%.
6 litres of the 30% and 4 litres of 60%.
363 liters
70gallons
614
You need 1 1/3 quarts of pure antifreeze.
0.6 of a pint.
630
4.2 quarts
You will need 3.2 gallons.
you must mean 2000cm3? 2000cm3 is 2L
The density of the medium must be given