Question 467101



the average speed {{{v=d/t}}}

{{{d=50.0km}}}

{{{t=40.0 min}}}...->...{{{t=(40/60) min=(4/6)=(2/3)h=0.67h}}}

{{{v=50.0km/0.67h}}}

{{{v=74.63(km/h)}}}