1.

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»

avg. velocity=total distance/total timet₁= 120/40   =3 hrt₂=120/30   =4 hrtotal distance=2×120                       =240 kmavg. velocity=total distance/total timev=240/3+4  =240/7   =34.2        [APPROX.]HOPE it helped and pls MARK as brainliest:)



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