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22 March, 16:35

Sallys physical education teacher timed her run and recorded the time and distance in the table below. What is her average speed?

Time (s) : 1, 2, 3, 4, 5

Distance (m) : 2, 5, 7, 10, 12

A) 3 m/s

B) 2.5 m/s

C) 2 m/s

D) 4 m/s

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Answers (1)
  1. 22 March, 19:45
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    Answer: B) 2.5 m/s

    Explanation: Find the average of the time and distance, and see how far they go in only 1 second.

    1 + 2 + 3 + 4 + 5 = 15

    15 divided by 5 = 3

    3 seconds

    2 + 5 + 7 + 10 + 12 = 36

    36 divided by 5 = 7.2

    7.2m per 3 seconds.

    7.2 divided by 3 = 2.4

    Therefore, the answer is technically 2.4m/s
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