In a 2000 m race, A beats B by 100 meters or 20 seconds. Find the speed of B?  Choose one.
A) 10m/s  B) 2m/s  C) 5m/s  D) 7m/s  E) 3m/s
Since A beats B by 100 m or 20 seconds,   it implies that B covers 100 m in 20 seconds.   Hence speed of B = 100/20= 
<gadget id="calculator">100/20</gadget>
<output>5</output>
5 m/s.   Answer: 5m/s
<result>C</result>
In a 2000 m race, A beats B by 100 meters or 20 seconds. Find the speed of B?