A long distance runner travels the first 10km at uniform speed of 10km/hr the next 15km at a uniform speed of 5 km/ hr ànd the last 20km with the speed of 4km/hr . Find his average speed for the entire race.
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Answer: 6.3(repeating) km/h
Step-by-step explanation:
10 km/h + 5 km/h + 4 km/h =19 km/h
19 divided by 3
6.3( repeating)km/h
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