Question 741643
Set up a ratio:  


{{{(32 liters)/(450 km) = (x liters)/(800 km)}}}


Cross multiply!


Since {{{a/b=c/d }}} means {{{ad=bc}}}, the above equation means that
{{{32*800= 450*x}}}


Then divide by 450:


{{{x=(32*800)/450=56.88889 }}} which rounds to 56.9 liters.


Dr. Robert J. Rapalje, Retired
Seminole State College of Florida