During a recent trip to Scotland, I filled my petrol tank to the top, a total of 10 gallons.
I travelled at 60 mph up the motorway and I knew that I could average 40 miles per gallon.
However, the moment I started, my petrol tank developed a leak and four hours later I ground to a halt having run out of petrol.
How much petrol had I lost through the leak?
[Ref: ZNFV] © Kevin Stone
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