Question 657337
if a boy walks {{{13km}}} in {{{2.0h}}}, then  his speed is {{{(13/2.0)(km/h)=6.5(km/h)}}}  or 

{{{(13/2.0)(km/h)=(6.5*1000m)/(3600s)=(6500/3600)(m/s)=1.8(m/s)}}}