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QAn aeroplane flying 1000 kilometres covers the first 200 kilometres at 200 kilometres per hour, the second 200 kilometres at 400 kilometres per hour, the third 200 kilometres at 600 kilometres per hour, and the last 200 kilometres at 800 kilometres per hour. Calculate the average speed of the plane.
ID: #4730
Time and Distance
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#4730Q ID
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Time and DistanceTopic
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Correct Answer: Option C
Explanation
In this case, the total distance traveled is 1000 km, and the total time taken is 25 hours. The average speed is then 1000 km / 25 hours = 40 km/hr. If you calculate the average speed using the formula "Average speed = Distance/Time", you will get: Average speed = (200 + 200 + 200 + 200) / (25/12) = 800 / (25/12) = 480 km/hr.
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