What is your average velocity if you drive a distance of 385 km at a speed of 47km/h, then the same distance a

what is your average velocity if you drive a distance of 385 km at a speed of 47km/h, then the same distance at a speed of 63km/h? i need help with physics !!!

Average velocity is total distance over total time.

Total distance = 770 km

Total Time: (385 km)/(47 km/h) + (385 km)/(63 km/h) = 14.3 h

770 km / 14.3 h = 53.8 km/h

Vavg = distance traveled / time to travel that distance

time to travel 385 km at 47 km/h = 385/47 = 8.19 h
time to travel 385 km at 63 km/h = 385/63 = 6.11 h

total distance traveled = (2)(385) = 770 km
total time to travel this distance = 8.19 + 6.11 = 14.3 h
Vavg = 770/14.3 = 53.8 km/h ANS