A car crosses a 600 m long bridge in 5 minutes. What is the speed of car in km per hour?  Choose the correct choice from the following choices:  A) 7 km/hr  B) 7.2 km/hr  C) 8 km/hr  D) 9 km/hr  E) 11 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. What is the speed of car in km per hour?