Question
A car travels from city X to city Y at a speed of 80
km/h and returns to city X at a speed of 100 km/h. If the total distance is 360 km, what is the average speed of the car for the entire trip?Solution
Average speed = 2xy/(x+y) where x = 80, y = 100. Average speed = 2*80*100/(80+100)Â = 16000/180 = 88.89 km/h. Correct answer: A) 88.89 km/h
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