Two cars drive in opposite directions at the midpoint between A and B at the same time. The bus arrives in A after 3 hours, and the truck is still 50 kilometers away from B. The speed ratio between the bus and the truck is 3:2. The distance of the city.
两车同时在甲乙两城之间的中点向相反方向开出，3小时后客车到达甲城，货车离乙城还有50千米，客车与货车的速度比是3：2，求甲乙两城的距离．
<gadget id="calculator">3 - 2</gadget>
<output>1</output>

<gadget id="calculator">3 + 3</gadget>
<output>6</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">50 / (1/6)</gadget>
<output>300</output>

<result>300</result>