a person crosses a 500 m long street in 4 minutes. what is his speed in km per hour? Options:  A) 7.5  B) 2.6  C) 3.9  D) 8.2  E) 2.7
<gadget id="calculator">500 / 1_000</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">4 * 60</gadget>
<output>240</output>

<gadget id="calculator">240 / 3_600</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/2) / (1/15)</gadget>
<output>15/2 = around 7.5</output>

<result>A</result>
a person crosses a 500 m long street in 4 minutes. what is his speed in km per hour?
divide(divide(500, const_1000), divide(multiply(4, const_60), const_3600))
"distance = 500 meter time = 4 minutes = 4 x 60 seconds = 240 seconds speed = distance / time = 500 / 240 = 2.08 m / s = 2.08 ã — 18 / 5 km / hr = 7.5 km / hr answer : a"