Answer:
110 km/hr
Explanation:
Average velocity can be determined by
V= S/T
where,
V=Average Velocity
S= Total Displacement traveled
T=Total time taken
A plane travels 350 km south with an average velocity of 125 km/h
v= 125 km/h
displacement 's' = 350 km
therefore, time = 350/125 = 2.8 hours.
then travels 220 km south with an average velocity of 115 km/h
v= 115 km/h
displacement 's' = 220 km
therefore, time = 220/115 ≈ 1.91 hours.
Total time will be:
T= 2.8 + 0.5 + 1.9
T=5.21 hours.
Total displacement of the plane is
s= 350 + 220
s=570 km
Therefore,
V = S / T
V= 570/ 5.21
V= 110 km/hr
Thus, the average velocity for the trip is 110 km/hr towards south
