The hound chased the hare at a speed of 22 kilometers per hour. The hound found the hare 2 kilometers ahead. It is known that the speed of the hare is 18 kilometers per hour. How many minutes can the hound catch the hare?
猎犬以每小时22千米的速度追野兔．猎犬发现野兔在前方2千米处．已知野兔的速度是每小时18千米，问猎犬多少分钟后可以捉到野兔？
<result>30</result>