Jack runs a 400 m track in 56 seconds and in second time he covers the whole track in 52 seconds. What is his average speed?
Question
Jack runs a 400 m track in 56 seconds and in second time he covers the whole track in 52 seconds. What is his average speed?
Solution
To calculate the average speed, we need to know the total distance covered and the total time taken.
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First, calculate the total distance: Jack runs the 400m track twice, so the total distance is 400m + 400m = 800m.
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Next, calculate the total time: Jack runs the track in 56 seconds the first time and 52 seconds the second time, so the total time is 56s + 52s = 108s.
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Now, calculate the average speed using the formula: average speed = total distance / total time.
So, Jack's average speed is 800m / 108s = 7.41 m/s (rounded to two decimal places).
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