Paul draws a plan of his school using a scale of $$2\text{cm}$$ to $$5\text{m}$$.  On the plan, the school hall is $$6\text{cm}$$ long.  What is the real length of the hall? 
选项为:A:$$15\text{m}$$  B:$$18\text{m}$$  C:$$9\text{m}$$  D:$$12\text{m}$$  请回答其中一个选项.