physics
posted by Uber confused on .
You ride your bike for 1.9 h at an average velocity of 10 km/h, then for 30 min at 11 km/h. What is your average velocity?

Average velocity
= total distance travelled / total time
Total distance = 1.9h*10 km/h + 0.5h*11km/h
Total time = 1.9h+0.5h
So average velocity = ? 
11.25 km/h

Average velocity is the total displacement divided by the total time.
t1= 1.5 hour (time)
t2= 30 minutes (time)
v1= 10 km/h (velocity)
v2= 18 km/h (velocity)
d1= 10 km/h x 1.5 hour = 15 km
d2= 15 km/h x 0.5 minutes = 7.5 km *convert the minutes to hour to get the answer 7.5*
15 km + 7.5 km (add the distance) = 22.5

1.5 h + 0.5 = 2 (divided by time) = 2
so, the answer will be 11.25 km/h.