Question

an over covers 1/3 of its journey with speed v1 for rest journey moves with speed v2 for time t2 and with speed v3 for time t3 calculate it average speed​

Answer 1

Let the three equal distances be s each.

Now,

v=st⟹t=sv

The time intervals are, therefore,

t1=sv1

t2=sv2

t3=sv3

The average speed is given by,

⟨v⟩= Total DistanceTotal Time

⟨v⟩=s+s+ssv1+sv2+sv3

⟨v⟩=3ss(1v1+1v2+1v3

⟨v⟩=31v1+1v2+1v3

⟨v⟩=3v1v2v3v1v2+v2v3+v3v1

Answer 2

Answer:

Hope it help you dear...