A person crosses a 600 m long street in 5 minutes. What is his speed in km per hour?

3.6 7.2 8.4 10

7.2

Speed = \(\frac{ Distance}{ Time}\) Speed = \(\frac{600}{ 300}\) m/s Speed = 2m/s Speed in km/hr - 2 x \(\frac{ 18}{ 5}\) = \(\frac{36 }{5 }\) = 7.2 km/hr *Note*  In order to convert km/hr to m/s - multiply by  \(\frac{ 5}{ 18}\) In order to convert m/s to km/hr - multiply by  \(\frac{ 18}{ 5}\)