A car runs at speed of 60 k/h over 50 km; the next 30 km at speed of 40 k/h; next 20 km at speed of 30 k/h; final 50 km at speed of 25 k/h. What is the average speed?
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Answer:
Step-by-step explanation:
Mean = 60+40+30+25 / 4
= 155 / 4
= 38.75 km/hr
Or approximately 40km/hr
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