Question

Aur bus travels a distance of 120 km with a speed of 40 km per hour and returns with a speed of 30 km per hour calculate the average speed of the entire journey

Answer 1

Answer:

avg. velocity=total distance/total time

t₁= 120/40

  =3 hr

t₂=120/30

  =4 hr

total distance=2×120

                      =240 km

avg. velocity=total distance/total time

v=240/3+4

 =240/7

  =34.2        [approx.]

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