there are two containers having mixtures of hydrochloric acid and water. in container 1, the ratio of hydrochloric acid and water is 1: 2 and in container 2 the ratio of hydrochloric acid and water is 4: 1. find the amount of the mixture that should be taken from container 1 in order to make 28 litres of a mixture containing equal amount of water and hydrochloric acid. (in litres)