Answer:
\(54\frac{km}{h}\)
Explanation:
This is a problem of conversion of units.
First of all you need to take the quantity the problem gives you and write it down with the units:
\(15.0\frac{m}{s}\)
Then you need to find the conversion factor for the units you need to convert:
In this case you need to convert from meters (m) to kilometers (km) and from seconds (s) to hours (h), so you have the following conversion factors:
- To convert from meters (m) to kilometers (km):
\(15.0\frac{m}{s}*\frac{1km}{1000m}\)
-To convert from seconds (s) to hours (h):
\(15.0\frac{m}{s}*\frac{3600s}{1h}\)
Then you should put the conversion factors in the same expression, so:
\(15.0\frac{m}{s}*\frac{1km}{1000m}*\frac{3600s}{1h}\)
Finally you multiply the numerators and the denominators and divide the results:
\(15.0\frac{m}{s}*\frac{1km}{1000m}*\frac{3600s}{1h}=54\frac{km}{h}\)
