A speed of 14 metres per second is the same as :  Choose one
A) 50.4 km/hr
B) 55 km/hr
C) 60 km/hr
D) 68.5 km/hr
E) None
Sol.   14 m/sec = [14 * 18/5] km/hr = 50.4 km/hr.   50.4 km/hrnswer 50.4 km/hr
<result>A</result>
A speed of 14 metres per second is the same as :