Answer:
1.8 km/h
Explanation:
Use dimensional analysis:
4.5m/9sec x 0.001km/1m x 3600sec/1hour=
16.2km/9hr=
1.8 KMH
to get the meters per second, simply divide the meters by the seconds. 4.5/9= .5
now, to convert from meters per second to kilometers per hour, multiply the meters per second by 3.6.
.5 x 3.6 = 1.8
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