A person crosses a 600 m long street in 5 minutes. What is his speed in km per hour?
Choose the correct choice from the following answers.
A) 2 km/hr  B) 5 km/hr  C) 7.2 km/hr  D) 9 km/hr  E) 11 km/hr
Explanation:   Speed =(600/5*60)m/sec   = 2 m/sec.   7.2 km/hronverting m/sec to km/hr   =(2*18/5)km/hr=7.2 km/hr   ANSWER: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?