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Races & Games · Question 16 of 73

Question 16

MediumOriginal question

A runs 1 km in 4 minutes and B runs it in 4 minutes 10 seconds. By how many metres does A beat B?

Options for question 16

Show the answer and explanation
CorrectNot quiteAnswer C

Correct answer: C

Explanation

  1. A finishes 10 seconds ahead. B's speed is 1,000250=4\frac{1{,}000}{250} = 4 m/s.

  2. In those 10 seconds B still had 4×10=404 \times 10 = 40 m to go.

Worth noting

1253\frac{125}{3} m uses A's speed for the last 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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