Sam and Tom are desperate for Mint Cake. Sam\textquotesingle s eco-friendly car takes him from London to Kendal, a distance of $$273$$ miles, while consuming petrol at an average rate of $$72.8$$ miles to the gallon.  Tom\textquotesingle s gas-guzzler uses $$6 \frac{3}{4}$$ gallons more petrol to cover the same distance. At what average rate does Tom\textquotesingle s car consume petrol? 
Overseas Competition->Knowledge Point->Word Problem Modules->Average Problems ->Questions Involving Average->Questions Involving Average (ordinary type)