Cars A and B drive from city A to city B at a speed of 55 km/h. At 10 o'clock in the morning, the distance traveled by car A is 5 times the distance traveled by car B; at 12 noon, the distance traveled by car A is 3 times the distance traveled by car B. How many hours later does car B leave than car A?
甲、乙两辆车从A城开往B城，速度都是55千米/小时．上午10点，甲车已行驶的路程是乙车已行驶路程的5倍；中午12点，甲车已行驶的路程是乙车已行驶路程的3倍．问乙车比甲车晚出发多少小时？
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">6 - 2</gadget>
<output>4</output>

<gadget id="calculator">5 / 55</gadget>
<output>1/11 = around 0.090909</output>

<gadget id="calculator">1 / 55</gadget>
<output>1/55 = around 0.018182</output>

<gadget id="calculator">3 * (1/55)</gadget>
<output>3/55 = around 0.054545</output>

<gadget id="calculator">(1/11) - (3/55)</gadget>
<output>2/55 = around 0.036364</output>

<gadget id="calculator">4 / (2/55)</gadget>
<output>110</output>

<gadget id="calculator">5 * 110</gadget>
<output>550</output>

<gadget id="calculator">550 / 55</gadget>
<output>10</output>

<gadget id="calculator">4 / (2/55) / 55</gadget>
<output>2</output>

<gadget id="calculator">10 - 2</gadget>
<output>8</output>

<result>8</result>