A car travels along a straight line for first half-time with speed 80 km/h and second half-time with speed 120 km/h. So, the average speed of the car will be: 2 points (a) 45 km/h (b) 50 km/h (c) 70 km/h (d) 60 km/h
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Answer:
60km/h
Explanation:
because half of 120 is 60
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