A person crosses a 800m long street in 10 minnutes. What is his speed in km per hour? Pick one:
A) 5.8km/hr B) 4.68km/hr C) 9km/hr D) 2.5km/hr E) 3km/hr
Speed = 800/10*60 = 1.3m/sec   =1.3*18/5= 
<gadget id="calculator">1.3*18/5</gadget>
<output>4.68</output>
4.68km/hr   Answer is 4.68km/hr
<result>B</result>
A person crosses a 800m long street in 10 minnutes. What is his speed in km per hour?