Re: [silk] Easily forgotten phrases

[Shenoy N]

>
> Second, my favorite dimensional analysis problem: you presumably know that
> the fuel efficiency of a car is often expressed as litres of petrol per
> 100km, right? Well, litres of petrol are a volume measure, and 100km is a
> length measure. Volume is length^3, so litres of petrol per 100km is
> length^3/length = length^2
>
> What might the "real world" significance of this area be? (Answer later if
> no one gets/spoils it.)
>
> -- Charles
>
The smaller the area number the longer the distance the car will go?