Question

a bus travels a distance of 120km with a speed of 40km/hr and returns back with a speed of 30km/hr. Calculate the average speed for the entire journey
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Answer 1

d1=120km

s1= 40km/h

t1 =?

t1=120/40

t1= 3s

Similarly

t2=120/30

t2=4s

So now,

Average speed = Total distance /Total time

= 240 / 7

= 34.2 m/s