The ratio of the walking speeds of A and B is 13:11. If A and B start from AB at the same time, walk towards each other, and meet each other in 2.5 hours. If they walk in the same direction, how many hours will it take for A to catch up with B? ?
甲、乙两人步行的速度之比是13：11，如果甲、乙分别从AB两地同时出发，相向而行，2.5小时相遇，如果他们同向而行，那么甲追上乙需要多少小时？
<gadget id="calculator">13 + 11</gadget>
<output>24</output>

<gadget id="calculator">13 - 11</gadget>
<output>2</output>

<gadget id="calculator">2.5 / 2</gadget>
<output>1.25</output>

<gadget id="calculator">24 * 1.25</gadget>
<output>30</output>

<result>30</result>