Question 1191596
<br>
average speed = total distance divided by total time<br>
50km at 80 km/h = 5/8 hours
30km at 60 km/h = 1/2 hour
80km at 100km/h = 4/5 hours<br>
total distance: 160km
total time: (5/8+1/2+4/5) hours<br>
{{{160/(5/8+1/2+4/5)}}}<br>
you can do the calculations....<br>