A man crosses a 600 m long street in 5 minutes. What is his speed in km per hour?	Choose the correct answer
A) 7 km / hr
B) 7.2 km / hr
C) 5.2 km / hr
D) 10 km / hr
E) 5 km / hr

Rationale: speed = 600 / 5 * 60 = 2 m / sec converting m / sec to km / hr . = 2 * 18 / 5 = 7.2 km / hr answer is b
Answer: B