A boy runs 200 metres in 72 seconds. What is his speed ? Choices.
A) 10 km/hr B) 14 km/hr C) 20 km/hr D) 12 km/hr E) 24 km/hr
200/72 * 18/5= 
<gadget id="calculator">200/72 * 18/5</gadget>
<output>10</output>
10 km/hr   10 km/hrNSWER:10 km/hr
<result>A</result>
A boy runs 200 metres in 72 seconds. What is his speed ?