📖 Read the passage, then answer the questions below
In a 400-metre race, Runner A finishes the race in 50 seconds, while Runner B finishes the same race in 62.5 seconds. Assuming both runners maintain a constant speed throughout, Runner A crosses the finish line well before Runner B does.
In a separate 200-metre race between two other runners, Runner C, running at a constant speed of 8 metres per second, gives Runner D a 40-metre head start, and yet the two runners cross the finish line at exactly the same instant, resulting in a dead heat.
In a third race between Runner E and Runner F, over a distance of 1,000 metres, Runner E beats Runner F by 200 metres, or equivalently by 25 seconds, when both runners run the full 1,000-metre race at their own constant speeds.
Question 1
By how many seconds does Runner E beat Runner F?
Question 2
What is the ratio of Runner C's speed to Runner D's speed?
Question 3
What is Runner D's speed?
Question 4
How long does Runner F take to complete the 1,000-metre race?
Question 5
What is Runner A's speed?
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