A car covers the first 39km of the journey in 45min and covers the remaining 25km in 35min. What is the average speed of the car?
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Answer:
average speed = total distance / total time taken
total distance = 39+25 = 64 km
total time = 45+35 = 80 min = 80/60 hours
= 4/3 hours
average speed = 64 / 4/3
= 64×3/4
= 16×3
= 48 km / hour
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