An athlete runs 100 meters race in 12sec. His speed is? Pick one
A) 30km/hr	B) 15km/hr	C) 25km/hr	D) 20km/hr	E) 32km/hr
speed = 100/12 = 25/3 m/sec   = 25/3 * 18/3 km/hr = 30km/hr   30km/hrnswer is 30km/hr
<result>A</result>
An athlete runs 100 meters race in 12sec. His speed is?