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Races & Games · Question 9 of 73

Question 9

MediumOriginal question

A runs 1 km in 3 minutes 10 seconds and B runs it in 3 minutes 20 seconds. By how many metres does A beat B?

Options for question 9

Show the answer and explanation
CorrectNot quiteAnswer C

Correct answer: C

Explanation

  1. A finishes 10 seconds before B. B's speed is 1,000200=5\frac{1{,}000}{200} = 5 m/s.

  2. In those last 10 seconds B still had 5×10=505 \times 10 = 50 m to run.

Worth noting

1,00019\frac{1{,}000}{19} m uses A's speed for those 10 seconds; it is B who is still running.

Concept
A margin in metres from two times
Typical time
90 s
Your time
—
The rule this testsBeating by a distance or a time
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Ten questions from Races & Games, at your own pace.

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Ten questions from Races & Games, at your own pace.

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