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tekilochka [14]
2 years ago
9

Speed1=20 m/s. time1=5sec

Physics
1 answer:
lina2011 [118]2 years ago
4 0

Answer:

<h2><em><u>2</u></em><em><u>1</u></em><em><u>.</u></em><em><u>2</u></em><em><u>5</u></em><em><u> </u></em><em><u>m</u></em><em><u>/</u></em><em><u>s</u></em></h2>

Explanation:

<h2><em>AVERAGE</em><em> </em><em>S</em><em>P</em><em>E</em><em>E</em><em>D</em><em>=</em></h2>

<em>=  \frac{s1 t1+ s2t2 + s3t3}{t1 + t2 + t3}</em>

<em>=  \frac{20 \times 10 + 30 \times 5 + 15 \times 5}{10 + 5 + 5}</em>

<em>=  \frac{200 + 150 + 75}{20}</em>

<em>=  \frac{425}{20}</em>

<em>= 21.25 ms</em>

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