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) 8.5
7.2istance =600 metre =0.6 km   Time = 5 min = 1/12 hr   speed = dist/time = 0.6/(1/2) = 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?