Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
1st Edition
ISBN: 9780078945830
Author: Charles William McLaughlin, Marilyn Thompson, Dinah Zike
Publisher: Glencoe Mcgraw-Hill
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Question
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Chapter 2, Problem 7STP
To determine

To Choose: The correct option.

Expert Solution & Answer
Check Mark

Answer to Problem 7STP

A correct answer is an option (A).

Explanation of Solution

Given:

The given table is shown below

    RunnerDistance covered (km)Time (min)
    Ling-Long12.542
    LaToya7.838
    Bill10.532
    Jose8.930

Formula used:

The average speed is

  s=dt  ...... (1)

Here, d and t are distance and time taken to travel.

Calculation:

Substitute 12.5 km for d and 42 min for t in equation (1)

  s=12.5km42mins=0.30km/min

Conclusion:

Hence,the average speed of Ling-Ling is 0.3km/min .

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