A truck travels from A to B at an average of 55 kilometers per hour. When the truck has traveled 20% of the whole journey, if it travels another 79.2 kilometers, the ratio of the distance traveled to the whole journey is exactly 3:5. How long does it take the truck to travel from A to B?
一辆货车从甲地开往乙地，平均每小时行55千米．当这辆货车行了全程的20%时，如果再行79.2千米，那么已行的路程与全程的比正好是3：5．这辆货车从甲地到乙地要行多少时间？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(3/5) - (1/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">79.2 / (2/5)</gadget>
<output>198</output>

<gadget id="calculator">198 / 55</gadget>
<output>18/5 = around 3.6</output>

<result>18/5 = around 3.6</result>