A person crosses a 600 m long street in 5 minutes. What is his speed in km per hour? Pick one:
A) 3.6
B) 7.2
C) 8.4
D) 10
E) 8
Speed = 600/(5 x 60)	m/sec.   = 2 m/sec.   Converting m/sec to km/hr   = (2 x	(18/5)) km/hr   = 7.2 km/hr.   Answer : 7.2
<result>B</result>
A person crosses a 600 m long street in 5 minutes. What is his speed in km per hour?