After visiting my Great Aunt Annie, I travelled home in her old jalopy. The car was old and battered, it had a leak from the petrol tank, and I was stuck in second gear.
This meant that I could only travel along at a steady 30 km per hour and managed a paltry 20 km per litre of fuel.
At the start of the journey I had placed exactly 10 litres of fuel into the tank. I knew though, that the fuel tank lost fuel at the rate of half a litre per hour.
Just as I arrived home, the car stopped because it had run out of fuel and I had only just made it.
How far was it from my Great Aunt's to my home?
