A' goes 10 km distance with average speed of 6 km/h while rest 20 km he travels with an average speed of 15 km/h. what is the average speed of ‘a' during the whole journey? 10 km/h 12 km/h 13 km/h 14.5 km/h
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The average speed of a during the whole journey is 10 km/h
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Answer:
avg speed = (10+20)/(10/6+20/15)
= 30/(5/3+4/3)
=3*30/9
= 10 km/hr
Step-by-step explanation:
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