Among the $$7$$ buses, there are $$7-1=6$$ intervals. So the answer is $$7\times5+2\times6=47$$ meters. 
At the red light, seven buses of the same length stop in a line. Given that the length of each bus is $$5$$ meters, and the distance between each two adjacent buses is $$2$$ meters, how long is the line? 

1: $$35$$ m 
2: $$49$$ m 
3: $$47$$ m 
4: $$54$$ m 