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A car travels at a speed of 36 kilometres an hour. The car can run 36 miles per gallon of diesel. If it makes a journey of 4 hours, what is the quantity of diesel, in litres, that it uses? Assume that 1 mile = 1.6 kilometres and 1 gallon = 4 litres.
General Hint: Enter the answer as an integer or a decimal in a single answer box. If two answer boxes are given, enter the answer as a fraction, with one box being the numerator and the other being the denominator. Read carefully whether the answer should rounded and make sure you round to the required degree of accuracy. Do not enter any symbols or characters in the box(es) provided.