A person crosses a 600 m long street in 5 minutes. What is his speed in km per hour? Choose the correct choice
A) 5.2 km/hr.  B) 8.2 km/hr.  C) 7.2 km/hr.  D) 3.2 km/hr.  E) 4.2 km/hr.
C   7.2 km/hr.   Speed=(600/5 * 60) m/sec   = 2 m/sec.   7.2 km/hr.onverting m/sec to km/hr   =(2*18/5) km/hr   = 7.2 km/hr.
<result>C</result>
A person crosses a 600 m long street in 5 minutes. What is his speed in km per hour?