A person crosses a 600 m long street in 2 minutes. What is his speed in km per hour? Select.
A) 12 B) 24 C) 18 D) 42 E) 64
distance = 600 meter   time = 2 minutes = 2 x 60 seconds = 120 seconds   Speed = distance/time=600/120= 
<gadget id="calculator">600/120</gadget>
<output>5</output>
5 m/s=5 Ã—18/5 km/hr=18 km/hr   Answer :18
<result>C</result>
A person crosses a 600 m long street in 2 minutes. What is his speed in km per hour?