Step-by-step explanation:
Total distance travelled S = S₁ + S2
50km + 60km = 110km
Total time t = t₁ + t₂
S1 S2
t = +
V1 V2
50 60
+ = 5 h
25 20
Average velocity=
Total distance travelled S
Total time of journey t
110km
5h
= 22 kmh-¹
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