A ship was sailing against the current, and the crew accidentally dropped a wooden box into the water. When they found out, it had been 5 minutes. Now they turned around and chased after the wooden box. How long did it take to catch up?
某船逆水航行，船员不小心将一木箱掉入水中，当发现时时间已过5分钟，现掉转船头去追木箱，问过了多久才能追上？
<result>5</result>