There are three ropes with a total length of 60 meters. One of them is 5 meters longer than the shortest one and 5 meters shorter than the longest one. What is the length of the longest one?
有三条绳子共长60米，其中一根比最短的一根长5米，比最长的一根短5米，那么最长的一根长多少米．
<gadget id="calculator">60 / 3</gadget>
<output>20</output>

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

<result>25</result>