Translation of "total length" into Chinese

Can anyone guess: what's the total length of wires in your brain?

谁能猜一猜:你大脑里神经元的总长有多少?

Its total length is 92 kilometres, and its average elevation above sea level is more than 5,000 metres.

中阿边界地处高寒的山区,全长约92公里,平均海拔在5 000米以上。