a man covered A certain distance at a speed of 8 kilometre per hour and returns at a speed of 4 km per hour find the average speed of a whole journey
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Answer:
Lcm of 8,4 = 8
time=distance/speed
8/8=1 hr
8/4=2hr
Total distance =16km
Total time=3hr
AvSpeed=16/3=5 I/3km/hr
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