题目

Bay of Fire, TasmaniaMaybe you have never heard of this place off the coast of St. Helen's, a small town in the less traveled part of Tasmania. But with clear water, clean sandy beaches, and some comfortable little houses for rent along the shoreline, this spot is sure to give you a perfect island vacation. Nam Ha, LaosNam Ha is one of the most satisfying tourist spots. You can stay with the local people, walk through the mountains, and be guided by the locals to the waterfalls through the Jungles. It's an experience you will never forget.The Big Island, HawaiiIt has been one of the most popul10．一辆小汽车用5分钟通过一个隧道，若它是以平均速度12m/s的速度行驶的，则此隧道的长度为多少米？