A car crosses a 600 m long bridge in 5 minutes. Whatis the speed of car in km per hour?
Pick
A) 1 m/sec  B) 7.2 km/hr  C) 3 m/sec  D) 4 m/sec  E) 5 m/sec
Speed = 600 m/sec.   5 x 60   = 2 m/sec.   Converting m/sec to km/hr (see important formulas section)   = 2 x 18 km/hr   5   = 7.2 km/hr   7.2 km/hr
<result>B</result>
A car crosses a 600 m long bridge in 5 minutes. Whatis the speed of car in km per hour?