A person crosses a 600 metre long street in 5 minutes. What is his speed in km per hour?
Select:  A) 8.2  B) 4.2  C) 6.1  D) 7.2  E) 6.5
7.2istance = 600 m = 0.6 km   time = 5 min = 1/12 hr   speed = dist/time = 06./(1/12) = 7.2 km/hr   ANSWER 7.2
<result>D</result>
A person crosses a 600 metre long street in 5 minutes. What is his speed in km per hour?