Q.4 Electric vehicles often have been proposed as an environmentally sound alternative to the petrol engine for transportation. In response to state initiatives, several car manufacturers now include electric vehicles among their available models. In spite of these state initiatives, the penetration of electric vehicles into the transportation sector of Australia, as well as other countries, remains modest. Estimate the potential reduction in petroleum consumption (in litres of petrol per year) that could be achieved in Australia by introducing electric vehicles under the following assumptions: i. On average, each litre of petrol can support 10.6 km of driving for a car. ii. The average car is driven 16,000 km per year. iii. Australia has 19.5 million cars. iv. 10% of Australian cars could be replaced with electric vehicles.