How many kilometres make square kilometres?

Answer:
This question cannot be answered sensibly. A square kilometre is a measure of area, with dimensions [L2]. A kilometre is a measure of distance, with dimensions [L]. The two measure different things and basic dimensional analysis teaches that you cannot convert between measures with different dimensions such as these without additional information.
First answer by Mehtamatics. Last edit by Mehtamatics. Contributor trust: 611 [recommend contributor recommended]. Question popularity: 2 [recommend question].