A person crosses a 300 m long street in 4 minutes. What is his speed in km per hour?	Answers:
A) 1.6  B) 4.5  C) 8.2  D) 6.5  E) 2.9

Rationale: "distance = 300 meter time = 4 minutes = 4 x 60 seconds = 240 seconds speed = distance / time = 300 / 240 = 1.25 m / s = 1.25 ã — 18 / 5 km / hr = 4.5 km / hr answer : b"
Answer: B