The distance between the upper and lower reaches of the Dasha River is 120 kilometers. Every day, two passenger ships A and B with the same speed set off from the upper and lower reaches at the same time and travel face to face. Assuming that the speed of the two passenger ships is 25 kilometers per hour and the water speed is 5 kilometers per hour, how many hours will the two passenger ships meet after departure?
大沙河上、下游相距120千米，每天定时有甲、乙两艘船速相同的客轮从上、下游同时出发，面对面行驶．假定这两艘客轮的船速都是每小时25千米，水速是每小时5千米，则两艘客轮在出发后几小时相遇？
<gadget id="calculator">25 - 5</gadget>
<output>20</output>

<gadget id="calculator">20 + 25 + 5</gadget>
<output>50</output>

<gadget id="calculator">120 / 50</gadget>
<output>12/5 = around 2.4</output>

<result>12/5 = around 2.4</result>