JJ143899
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In a swimming race, Miho swam the first 50 m in 42 s. She swam the second 50 m in 40 s. What was Miho's average speed during the race?

a.1.22 m/s

b.1.25 m/s

c.1.19 m/s

d.0.82 m/s

Respuesta :

onesiolivia
the answer is d) 0.82 m/s
LucianoBordoli

Answer:

The correct option is a. [tex]1.22\frac{m}{s}[/tex]

Explanation:

In order to find the average speed of Miho during the race we can use the following equation :

[tex]AverageSpeed=\frac{TotalDistance}{ElapsedTime}[/tex] (I)

The total distance that Miho swam is the sum of :

[tex]50m+50m=100m[/tex]

The total elapsed time is the sum of :

[tex]42s+40s=82s[/tex]

If we replace the data found in the equation (I) :

[tex]AverageSpeed=\frac{100m}{82s}[/tex]

[tex]AverageSpeed=1.22\frac{m}{s}[/tex]

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