Respuesta :

1 km = 1000 m
1 h = 3600 s

75 km/h
75 *1000 m / 3600 s
75 * 5 m / 18 s
25 * 5 m / 6 s
125 m / 6 s
20.8 m/s

answer is c.

For this case we must apply the following conversion factors:

[tex]1km = 1000m\\1h = 3600s[/tex]

We then have the following speed:

[tex]75 \frac {km} {h}[/tex]

Applying the conversion factors we have:

[tex]75 \frac {km} {h} 1000 \frac {m} {km} \frac {1} {3600} \frac {h} {s}[/tex]

Rewriting we have:

[tex]20.8 \frac {m} {s}[/tex]

Answer:

The speed of the car in m / s is:

[tex]20.8 \frac {m} {s}[/tex]