a) Define average speed.
(b) A bus travels a distance of 120 km with a speed of 40 km/h and returns with a speed of 30 km/h. Calculate the average speed for the entire journey.
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Answer:
The average speed of an object tells you the (average) rate at which it covers distance. If a car's average speed is 65 miles per hour, this means that the car's position will change (on the average) by 65 miles each hour.
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a) The total distance by total time is called average speed
b) Total Distance = 120 + 120 = 240m
Time 1 = 120/40 = 3 h
Time 2 = 120/ 30 = 4h
Hence, Total Time = 7 h
Hence,
Avg speed = 240/7 = 34.14 km/h
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