A car crosses a 600 m long bridge in 5 minutes. Whatis the speed of car in km per hour? Choose the correct choice:
A) 7 km/hr	B) 7.2 km/hr	C) 8 km/hr	D) 8.2 km/hr	E) 8.3 km/hr
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?