YES,
8,88888888... km/val

"saimhe" <oh.no@oh.my> wrote in message 
news:hde29t$s4p$1@trimpas.omnitel.net...
>> 8.9
>
>  s = 10·t1 = 8·t2 ; t2 = 10·t1 / 8
>
>  v = 2·s / (t1 + t2) = 20·t1 / (t1 + 10·t1 / 8) = 160 / 18 = 8,(8)
>
> -- 
>  saimhe