A person crosses a 800 m long street in 5 minutes. What is his speed in km per hour?  Choose the correct choice from the following.
A) 1.23	B) 2.86	C) 4.36	D) 9.25	E) 9.61

Rationale: "distance = 800 meter time = 5 minutes = 5 x 60 seconds = 300 seconds speed = distance / time = 800 / 300 = 2.67 m / s = 2.67 ã — 18 / 5 km / hr = 9.61 km / hr answer : e"
Answer: E