A person crosses a 650 m long street in 5 minutes. What is his speed in km per hour?
Choose the correct choice from the following
A) 5.2 km/hr.
B) 8.2 km/hr.
C) 7.8 km/hr.
D) 3.2 km/hr.
E) 4.2 km/hr.
C   7.8 km/hr.   Speed=(600/5 * 60) m/sec   = 2.16 m/sec.   7.8 km/hr.onverting m/sec to km/hr   =(2*18/5) km/hr   = 7.8 km/hr.
<result>C</result>
A person crosses a 650 m long street in 5 minutes. What is his speed in km per hour?