Answer to 10 b)
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A bus travels a distance of 120 km with a speed of 40 km/h and returns with a speed of 30 km/h . Calculate the average speed for the entire journey.
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Answer:
2
34 ---- km/h
7
Explanation:
time=distance/speed
t1=120/40
=3h
t2=120/30
=4h
average speed=total distance/total time
=(120+120)/(3+4)
=240/7
2
=34------ km/h
7
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