Question 937164
recall: {{{d=s*t}}} where {{{d=distance}}}, {{{s=speed}}}, and {{{t=time}}}
 

if they travel {{{d=324km}}} in {{{t=4h}}}, then we have


{{{324km=s*4h}}}


{{{324km/4h=s}}}


{{{cross(324)81km/cross(4)h=s}}}


{{{s=81(km/h)}}}