A subbase for an airport runway, 100 m wide, 2000 m long and 500 mm constructed out of a clayey sand excavated from a nearby borrow, where the content is 6%. This soil is being transported in trucks having a capacity on each load weighs 13.2 tonnes. In the subbase course, the soil will be place content of 14.2% to a dry density of 1.89 t/m³. (a) How many truck loads will be required to complete the job? (b) How many litres of water should be added to each truck load? (c) If the subbase becomes saturated later, without any change in volume, v the water content? Assume G, = 2.7.